"It requires a lot of manpower, and it needs to be similar to those used to build roads, plus in order to stabilize it, it needs to add reinforcement. More need for more other things, at this time to add a lot of stable measures, the reservoir can be built quickly, as long as it can be completed around February, before entering the summer, you can intercept a lot of water, so as to ensure that there is enough water downstream, but also to ensure that enough water is stored, when the time comes, relying on these reservoirs, you can be worth a lot of victims, and at this time you can use these reservoirs to ensure that the victims will not die of thirst, plus those families take out food to hire them to build roads for disaster relief, Then there won't be too many starving people. Li Hang raised his eyebrows, at this time there was already a solution, and the rest was up to their people.

Just as he was saying these words, Uncle An was shaking his hand playfully, and then pointed to the door.

Obviously, this is the question of the door, someone made it.

"Interesting! Is there anyone else who can make it at this time? ”

Li Hang was very surprised, and Ying Yun on the side was even more surprised. "A lot of the things that are out there are some mathematically related things, and I'm afraid it will take a long time to make them with paper and pen."

Outside, a group of students looked at the man standing in front of the sign with some disgust, they hated this man, if it weren't for the fact that he was the son of Wang Lu, the head of the court officials, I was afraid that they would have said something a long time ago.

But this man named Wang Yu never speaks on weekdays, and he is always ignored when others tell him, he only looks at the sun, moon and stars, and only looks at those strange things in a daze, which makes him look very weird, even in the academy, he never interacts with these people, he doesn't say anything alone, even if others show favor, he doesn't know how to deal with it, not only does he look like an imbecile, even those poems and songs he is not very good at, Wang Lu's little son is afraid that it is not wasted.

But even today, when these questions stopped almost everyone, that Wang Lu solved the first two questions just by looking at them when he passed by here.

But he hadn't seen the third question, so he stopped for a while, and then told Uncle Pan An, who was waiting for everyone to answer the question, his answer.

These questions even those officials have to be counted for a while after they have experienced actual combat tests, but this one actually gave the answer casually, although there are some slight differences, but the answer is very positive.

This surprised Pan An, who was in charge of the reception here, because even Ying Yun couldn't make these questions in a short time, but this man could.

"Childe's surname?"

At this time, Pan An was also a little depressed, as a person from the Prince's Mansion, he had never seen a noble son on any road, although this was gorgeously dressed, but he was still very eye-catching, you must know that he was at this level, he could always see a lot of noble sons, and his memory could also allow him to remember many important people, after all, this is their master's skill, and this skill is a housekeeper must master.

"King!"

At this time, he said, pointing curiously at the things on it.

"That's what you're using to test those students? It's a bit difficult, but it's also very fun, how can you calculate the area of the circle so accurately? The man didn't come to scold, but looked at the calculation of the round land with a curious expression.

He didn't know about the so-called scolding of Li Hang at all, he only cared about this.

"Wang Yu, this is the so-called counting that Li Hang made, he doesn't learn anything, he only knows how to calculate these things, what's the use of not understanding the way of the sage!"

"That is, where does this practice place the way of the saints?"

At this time, it was already a group crusade, but they didn't care about it at all, but just watched the calculation of the circumference.

"Can you let me meet this Li Shangzao?" He was very excited, and if he could figure it out at this time, maybe the doubts in his heart could be solved.

Saying that, he was even more curious about this value.

"Yes, Li Shangzao said that as long as you make these three questions, you can come to see him, and they have stopped at this time, right?" Uncle An looked at the people behind him with a smile.

Indeed, these people have now ceased to exist.

At least for them, although Li Hang came up with something to make it difficult for them, at this time, Wang Yu came out and got these things done.

Now it's just a matter of watching Wang Yu do it.

Several people came to Wang Yu's side and told him what the teachers in the school had said, which was what they said when they were going to go to Li Hang's theory.

Originally, it was only necessary to provoke Li Hang out, and then everyone could come to humiliation, theory, and then humiliation, and everything would be fine.

But what about now?

Looking at these classmates, they can hardly make this thing, only this Wang Yu can, but now Wang Yu's attitude really makes them a little depressed.

It seems that Wang Yu doesn't plan to mess with them, but wants to see this topic, and he is very excited.

There was a lot of muttering, and at this time, a few of the students looked at Wang Yu with a look of ease. "Wang Yu, although my brothers used to think that you were stupid, but at least you are also a person in the academy, if this Li Hang really succeeds, then our academy will have to fight with those mud legs in the future."

As he spoke, he looked at the king's road.

As long as he can go in, it's enough, as long as he can listen to the reality of this Li Hang.

As long as you know Li Hang's truth and truth, then you can get him.

Especially what Li Hang said can fly, although they don't believe it very much, they also have to take care of Li Hang's things.

"Remember! After entering, you must find out whether this Li Hang is really capable, or is he a showman! ”

Several people pushed Wang Yu excitedly, looking like we are relying on you.

Then he pushed Wang Yu in.

A place like the Prince's Mansion is actually not a special place, but the decoration inside is still gorgeous.

After Uncle An reported it to the people inside, Li Hang looked at the boy over there who was just looking at the paper with a look of surprise.

It's as if there are only a few pieces of paper in this world, and he doesn't even look at the people around him.

Immersed in his own world.

"Did he calculate it by heart?" Li Hang really couldn't believe that someone could do mental arithmetic, although he had tried to make it as simple as possible, but it would be quite difficult to add, subtract, multiply and divide these things if they were all mental arithmetic. What's more, they don't know pi, and to calculate an approximate area, it's not as simple as a 3.14 like Li Hang.