Now Wu Zhuan is getting more and more crazy. He only eats one meal a day and can't stuff it anymore. Then he drives the small wooden boat in the lake and floats on the water all day. Fortunately, it's not summer, otherwise it would be strange if he doesn't get rid of a few layers of skin.

The ducks on the lake were familiar with him. Every time he saw him coming, he just screamed "quackly", but he would not panic at all. Sometimes he would circle around him, which made Caoer envious. Serious men are the cutest. Caoer now can't help but look at the kid secretly, guessing what he wanted to do? His brother's new book had been crushed by him, and then he threw it aside. He stood on the boat all day, poked it into the lake with a bamboo pole, and after seeing the water stains on the pole, he recorded it on a small paper book. He didn't know what he was recording. It was so strange.

"The master's new book has a method to calculate the area. It not only can calculate the circumference and square and rectangle area that I already know, but also the area of ​​triangles, diamonds, and circles. There is also a kind of calculation method called trapezoid, which has calculation rules and methods. The lake surface is irregular, but I can divide it into regular shapes and then calculate the area. But just area is not enough. How can I calculate how many buckets of water this lake is equivalent to? The large wooden barrel I use can hold ten kilograms of water. As long as I know how much buckets of water this lake can hold, I can weigh the weight of the lake! The master's book is shallow, and no further calculation method is given in it, but I don't need to worry. As long as I measure the depth of different positions and then obtain an average depth, I can go to the master. Combining area and depth, I can definitely get the answer I need!"

Wu Zhuan held the soaring bamboo pole in his hand and kept talking to himself like a madman; Cao'er ran to the pavilion and put on hot milk tea, cake, and even a roasted lamb leg. The fragrance filled the entire lake. He seemed to have not realized it, and there was only this lake water in his eyes.

The boat gradually sailed to the middle of the lake. Wu Zhuan poked out a bamboo pole, but found that it was not long enough, so he changed to the longest one. He could not touch the bottom of the lake. Unconsciously, he poked half of his body out of the boat, but forgot that he was still on the water. His body shook and fell into the water, splashing a big splash of water.

"Sangwazi, he fell into the lake!"

"It seems."

"I remember he can't swim... Save people quickly!"

"Don't worry. I can't die!"

Sang Wazi plunged into the lake and rescued the almost frozen stubborn bull from Yue Guo. This is really a stubborn bull. Is Heianlang's problem so easy to solve? Can you poke it with a pole and solve it?

As she complained in her heart, Sang Wazi secretly admired this boy. If it were her, she would never dare to go to the boat alone if she didn't know how to water, let alone in winter. This is not a problem solving, it is a life-threatening thing.

Looking at Wu Zhuan, who was trembling by the fire, Cao'er couldn't tell what it felt. He couldn't help but persuade him, "I'll just ask you to help me when I'm mixing rouge in the future. It doesn't matter if you lose to your brother, so don't work so hard, okay? Sangwazi. What else do you think? Go and help him take off his clean clothes... and you can also change your clothes yourself, don't get caught in the cold."

After changing into the clothes Sang Wazi brought, Wu Zhuan seemed to be unable to see his hostile gaze and said to Cao'er with a smile: "Sister Cao'er, the pole is not long enough, but I saw it after falling to the bottom of the water. In fact, it is only half a foot away. With this depth, plus what I recorded before, I can get the average depth of the lake, which should be..." He quickly took out a small calculation from the wet clothes, and slapped for a while, Wu Zhuan laughed: "The average depth of the lake is one zhang, one foot and three inches! Haha, I'm going to find Bai Zi!"

After this kid fell into the water, he didn't forget the depth of the lake? Sang Wazi and Cao'er looked at each other. This is a real madman, even more crazy than Mr. Yang Zhu!

When Wu Zhuan rushed into Bai Dong's room, his hair was not dry yet. It was as if he was wearing a bird's nest, but Bai Dong seemed to have seen the most charming beauty and the noblest nobleman. He asked him to sit in front of him and pour him a cup of kung fu tea: "Actually, you don't have to work so hard to measure the depth of the lake. I had measured it as early as when the lake was built. What I wanted was your idea of ​​solving the problem. If you come to ask me, I would give this condition, and you wouldn't have to work so hard."

"Maybe you'll measure it wrong? Even if it's the approximate value, I'm more at ease with the measurement myself."

"Very good. What you want is here, how many days will you have to give me the answer?"

Bai Dong smiled and handed Wu Zhuan a first draft. This was a new book that had not been printed yet, and the title was "A Preliminary Exploration of Three-dimensional Geometry".

It was like a child who saw his favorite toy. Wu Zhuan didn't bother to drink tea and excitedly opened the manuscript to read it. With just a glance, he was deeply fascinated by it. He actually forgot the time and sat opposite Bai Dong to look around.

Bai Dong did not disturb him, and waited quietly for a few hours before seeing him collect the manuscript, pick up the paper and pen, take out the abacus, and calculate it with a crackling amount. After more than half an hour, Wu Zhuan suddenly burst into laughter: "Master, I've calculated it!"

"It's not bad, the error is not too big."

Bai Dong took the answer and read it, nodded slightly, picked up "Si Xue" and handed it to him: "You are quite talented in arithmetic. This time you won, and you can become my personal disciple. How do you feel when you look at this book again?"

There is indeed no genius with comprehensive development in the world. Wu Zhuan took "Si Xue" and read it for a few times, and then handed it back to Bai Dong bored: "I can't understand it."

"Haha, if you don't understand, don't read it. Let's go and have a meal. It's already evening." Touching the boy's head, Bai Dong suddenly felt a little worried about Lu Zhen. If the future king of Yue's country becomes a mathematician, she would definitely be disappointed, right?

***

"A gentleman's six arts, rituals, music, shooting, imperialism, books, numbers, and arithmetics are arranged at the end. I didn't expect that Bai Zi's "Bai Zi's New Calculation" would make the world face up to the numbers from now on, which is equivalent to proving that the teachings taught by Master Confucius are all orthodox. There are no last chapters and side branches!"

In the spacious and bright back hall of the ancestral hall, dozens of men sat upright. Some of their hair and beards were white, or the first time they saw gray or black hair, each with a wooden crown on its head and cloth clothes. Although it was not as hard-working as the Mohist family, even their shoes had to be made of grass, the hall was full of cloth and no one was wearing gorgeous clothes.

Although these men were not dressed in luxurious clothes, they all looked clear, had a clear look, were polite, and had no white faces when they were in contact. At first glance, they were a higher level of farming and reading family. At this moment, they were all respectfully educated, looking at a white-haired old man sitting high with admiration, respect, and even awe. The old man had white eyebrows and rosy faces. He didn't even have spots in his old man, and he was an old "immortal man" with crane hair and childish face.

What the old "Immortal Man" said just now. The six arts of gentlemen come from Zhou Li, but they were vigorously promoted by Confucius. It is not wrong to say that it was passed down by Confucius.

"What my father said is that it's a pity that books are good books. The purpose of publishing books is inferior. The author is Bai Dong, Qin State, who was first known for his literary reputation because of his invention of the new poetry style a few days ago. He had written a book called "The Jungle of Young Learning". He was named Bai Zi because of his merits in elementary school. He thought he would have many works, but he was indulging in the learning of merchants. He actually went to Lantian to fire porcelain such as porcelain, which was useless to save the world, but he was a good player. Now he boasted about Haikou. He said that he wanted to build a Fengming Academy that was ten times larger than Jixia Academy. Fengming Qishan... What a big tone. I'm afraid that what he was most worried about was that the Academy was built, but there was no Tianxia Academy..."

A white-haired old man sitting at the bottom of his head bowed and answered. He was also in his seventies. He was already considered a long-lived old man in this era, but in front of the first old man, he was as reserved as a teenager.

"Yushan, I have taught you that a gentleman should be consistent and have something to think. As long as it is not a lie in the dark room, I should squirt it out. Do you want to say that Baizi published this book "Baizi Xinsan" to attract scholars from all over the world, not to study it sincerely? Moreover, his name is Baizi, but in fact, he is careful and greedy for gold, pearls and beautiful jade, and does not regard it as a glance at my Yan family? Since he has this intention, why just say half a sentence? This is the act of a villain, and it will definitely not be done in the future! After the sect meeting, he will face the wall for three days and think about his past..." The old "Immortal Man" with a crane hair and a young face shook his head slightly.

"I thank my father for his teachings, and my son is willing to be punished. However, my son still thinks that Bai Dong is superficial and is mostly a skillful method, especially the word "power" and such a person is not considered by my Yan family!"

The old man named Yushan respectfully admitted his mistake, but this was just admitting his mistake to his father and would not change his view of Bai Dong.

"Crazy! If I, Confucianism, have all the crazy people like you, how can I not be weak? Etiquette and music education are the way to save the world. Is it not to develop business? If Bai Dong had no business methods, how could he make Xu Gong of Qi generously give 100,000 stones of grain? If there was no food and only rely on etiquette and music education, the victims of Qin would have starved to death for eight times! Meng Ke only said that the people are the most important, but he just said, when did he see him save thousands of people? But in your eyes, this person who is full of strange tricks and tricks, saves millions of victims, and makes a country's cultural affairs gradually prosper!"

"Don't you take care of my Yan family? In my opinion, the purpose of not entering my Yan family is to be a great scholar on the corner of your mouth and a wise man in the article! You have been facing the wall for three days and changed to March. You think about your mistakes every day and record them every day. If you don't remember one day, if you don't remember it, you won't say that your surname is Yan in the future!"

The old man was furious and picked up a book from the desk beside him, throwing it at his son: "When facing the wall, I will read this book "Seeing and Learning" with all my heart. I also have to take notes every day, and I must not make excuses!"

"No, my son will go to face the wall and think about his mistakes. My father must calm down and don't get angry..."

Yan Yushan never expected that his father would be so angry, kneeling on the ground and kowtowed repeatedly, wishing he could replace him; dozens of Yan family men also knelt down one after another, calling his ancestors to calm their anger.

"From today, everyone in the Yan family will read "Si Xue" carefully. This is a book that is written by great wisdom. You must read it carefully and read it carefully! There is also the book "Baizi Academic Science". If anyone can't learn one-yuan equations and abacus formulas, you will also be punished to face the wall! The Yan family women also need to learn it. You can not make abacus, but you must know it if you want to learn it!"

Ps: Thanks to the ‘Zhouxu’ and ‘JimH’ brothers for their monthly ticket support:)
Chapter completed!