"Fema, what achievements have you made in mathematics?" Zhu Youlang asked. He was not interested in Ferma's private life. As long as he was really the great mathematician Ferma, nothing else mattered.

"Your Majesty, he said, he has research on analytical geometry, calculus, number theory and probability theory." Hatis said.

When Zhu Youlang heard this, he finally met Fermat, whom he knew, and was overjoyed. However, he did not show any expression on his face.

"Ferma, did you come alone, or did your whole family come?"

"Your Majesty, he came from the whole family, his wife Luise and daughter Clara came with him."

"Fema, don't do law anymore. China does not have the profession of lawyers yet, so you can do your maths well." Zhu Youlang changed his career to Ferma without hesitation.

"Yes, Ferma will do it as the command of His Majesty the great emperor." Ferma replied.

"Learn Chinese well, it's too hard to talk to you." Zhu Youlang said.

"Yes, yes, yes, I must study hard." Feima was happy to hear the emperor agreeing to keep him.

"Hatis, have Ferma's residence been arranged?" Zhu Youlang turned around and asked Hatis.

"Back to your Majesty, the group of people who have just arrived are now concentrated in a yard," Hatis replied.

"No, this is not possible. How can you conduct mathematical research without a good environment? This way, you can set up a separate courtyard nearby for him and let him move in. In addition, give him a settlement fee of 1,000 taels of silver, and buy whatever is missing. Also, build a math branch office to make him the director." Zhu Youlang ordered.

"Abide by the order." Song Yingxing quickly replied.

"Thank you, Your Majesty, thank you!" When Feima heard that Zhu Youlang not only set up a house for him, but also gave him a large sum of silver, and also made him the director of the Mathematics Branch. He was so happy that he burst into tears and thanked him repeatedly.

Zhu Youlang waved his hand and ordered him to go down, then said to Hatis: "You can distinguish it well. If you are really capable, you must give others the best treatment and not let others suffer grievances. If you are here to cheat and drink, you must be sent back. I will not raise waste here, especially foreign waste."

"Yes, I must do as the emperor ordered." Hatis replied with a blow of sweat.

"Jiao Ni, what are your achievements?" Zhu Youlang had noticed Jiao Ni being eager to try, and seemed very excited. He knew that he must have made some inventions as soon as he guessed.

"But it's my turn to speak. Your Majesty, I have already developed the steel gun!" Jiao Ni couldn't wait to speak loudly when he saw the emperor ask, and waved his arms vigorously when he spoke. It seemed that this was not enough to express his excitement.

"What? The steel gun was created?" Zhu Youlang sat up from his seat happily when he heard this: "Let's go and take me to see."

Zhu Youlang walked out excitedly, and Song Yingxing and others quickly followed.

The group came to the military weapon camp. When Yao Desan and Zhang Nianbao heard that the emperor had arrived, they all hurried out to greet him.

"Where is the steel gun? Where? Take it out quickly and let me see it." Zhu Youlang asked anxiously without waiting for the two of them to kneel down and kowtow.

"Your Majesty, wait a moment, I will go and get it." After saying that, Yao Desan ran to the casting workshop and took out a gun soon. Zhu Youlang saw that it looked similar to a spear in later generations, but there was no sight or bayonet. He took it and weighed about seven or eight pounds. He pulled the bolt and looked at it, but there were no bullets.

"Are there any bullets?" Zhu Youlang asked.

"Yes, I just sealed the lamb." Zhang Nianbao replied, and then handed Zhu Youlang a bullet.

When Zhu Youlang held it in his hand, he looked like the bullets from later generations. The shell was made of copper and the bullet was made of iron. However, the bullet was sealed with wax.

Zhu Youlang didn't know how the gun was like, so he asked, "Have you tried it?"

"Try it, the range is about twenty feet."

"Twenty feet? It's too close. How about the accurate head?"

"There is an error, and the error is within three feet."

"The error is too big, right? If you look at the head, don't you hit the foot? Come on, try shooting." Zhu Youlang felt a little disappointed and ordered.

"Yes." Yao Desan took the gun and ran to the front. He asked someone to draw a human-shaped sign on the south wall. He raised the gun and glanced, and pulled the trigger. He heard a "bang" sound, and bricks and soil on the wall flew. Zhu Youlang walked over and took a look. He was so he was bounced half a meter away from the image.

Zhu Youlang thought for a while and asked, "Have you found the reason? Why is the distance so close? Why is the error so large?"

"When you go back to Your Majesty, I have done a lot of experiments, but I have not found the reason, which has disappointed Your Majesty." Jiao Ni replied in frustration when he saw that the emperor was not very satisfied.

"Hahaha, you don't have to be upset. It's already very good to be able to do this in such a short time. There are many techniques involved, such as steel training, casting, etc. Cedar, remember, the craftsmen of the military weapon reward camp cost 100 taels of silver, and the charred mud, Yao Desan and Zhang Nianbao each cost 200 taels of each." Zhu Youlang quickly cheered up.

"Thank you Your Majesty!" Jiao Ni, Yao Desan, Zhang Nianbao and others quickly knelt down to thank him.

"Flat!" Zhu Youlang ordered the three of them to stand up and pondered: "This gun is already good. The shooting distance is close and the error is large. Is the gap between the bullet and the barrel too large?"

"Your Majesty, I have also thought about this question, but the size of the bullet is exactly the same as the inner diameter of the gun chamber, and there is no possibility of a gap." Jiao Ni replied.

Zhu Youlang recalled his limited knowledge of guns, his eyes lit up, and he said, "You try carving a spiral rifle on the inside of the gun chamber."

He only knew that the function of rifle was to allow the bullet to rotate rapidly when it passed through the gun chamber, which not only ensured accuracy but also increased range. The cross-section generally looked like a windmill. As for the scientific principles, he didn't understand it.

"Rifle?" Jiao Ni and others asked inexplicably.

"Let's go to your office, bring paper and pen, and I'll draw it for you." After Zhu Youlang said that, he led everyone to the office.

Jiao Ni brought paper and pen, Zhu Youlang drew a cross-sectional view of the gun barrel, and then told them what he knew.

"Your Majesty, it's too difficult to carve such a thread in the gun chamber, and there is no corresponding tool." Jiao Ni said with a frown.

"If you don't have tools, find a way to do it. Anyway, I don't care what method you use, and I have to do the rifle. I just want the result, no matter the process." Zhu Youlang said unreasonably.

"Deputy Director Jiao, don't worry. We can think of solutions on the barrel mold. I don't think it's too difficult." Yao Desan worked on casting for a lifetime, and he could see the trick at a glance.

"Yes, mold! Just think of a solution on the mold!" Jiao Ni heard it and thought for a moment, feeling it was feasible, so he walked out.
Chapter completed!