"Senior, you said you wanted an hour, but Brother Yang only took a dozen breaths just now. Qin Menglan said suddenly.

"That's right. Lu Miaozi was stunned for a moment, not dissatisfied with Qin Menglan's words, and immediately looked at Yang Dong curiously: "Little brother, how did you calculate so fast?"

“……”

Yang Dong frowned, picked up the small book recorded by Lu Miaozi, turned a few pages, almost crazy, he didn't understand what was written on Lu Miaozi's small book, anyway, roughly calculate the volume of a triangle, you have to write half a page, and it is also a Chinese number, which can be calculated quickly is strange.

Don't look at the arithmetic operation children in primary school now, but this can be regarded as a leap in the field of mathematics, in ancient times, I didn't know the ninety-nine multiplication table, and a simple calculation wasted a lot of brain cells.

Although this Lu Miaozi is extremely smart and has been immersed in machinery for a long time, he has no foundation in modern mathematics, and he is helpless.

"Senior, I don't care what method you use to calculate now, I will teach you a new set of calculation methods, first of all, you have to know these ten symbols, they are 0, 1, 2 ......"

Yang Dong taught Lu Miaozi the Arabic numerals, the basic arithmetic calculation basics, as well as the formulas for calculating the volume area of cylinders, fans, triangles, diamonds, etc.

Lu Miaozi is worthy of being a genius, modern people have to learn things for nine years, Lu Miaozi understood it after a while, looking at the symbols and formulas in the small book, the excitement in his heart is beyond words.

"Little brother, you are really knowledgeable, where did you learn this, and what else can you teach me?" Lu Miaozi smiled flatteringly.

"Yes, but you have to tell me where Yang Gong's treasure house is, and what mechanisms are in it. Yang Dong said.

Lu Miaozi's face suddenly became depressed, and she stood in place without saying a word.

"Alas. It's a pity that I can't find a successor to my scientific knowledge. Yang Dong sighed heavily: "Wanwan, let me ask you."

Lu seniors want to build a manor, but the manor is in the mountains of Qingfeng Valley, and only outside the mountain there is a straight official road, and the vertical distance between the manor and the official road is 20 miles. The sand and gravel field is 100 miles away from this vertical point.

Now it is known that the ratio of freight per ton kilometer of the official road to the mountain road per ton kilometer is 3:5, in order to make the freight of sand and gravel from the sand and gravel yard to the site of the manor the most economical, may I ask which point of the official road is the best way to open up the mountain road into Qingfeng Valley, and how far is it from the sand and gravel yard and the vertical point?"

Wan Wan: "......"

Lu Miaozi, Qin Menglan, Red Whisk Girl: "......"

"Also, Lu Miaozi's predecessors want to make a very powerful compound bow and crossbow, the power end of the compound bow crossbow is composed of two rollers and a wheel axle, and it is known that the radius of A and B rollers is 3 and 4 respectively. The masses are 6 and 8, respectively, and the coefficient of friction of the axle is 0.3, and now the two rollers are hanging with strings of objects of 9 and 5 weights respectively, and the ropes are not counted for mass.

Excuse me, what is the acceleration of two objects, what is the tension of the rope, and what is the angular acceleration of the axle?"

Wan Wan: "......"

Qin Menglan, the girl of the red whisk: "......"

"Little grandpa. Teach me. Lu Miaozi hugged Yang Dong's waist and prostrate in front of Yang Dong. A handful of snot and a handful of tears, and the hazy eyes were full of worship and thirst for knowledge.

"Seniors, don't call me that, juniors can't stand it, as long as you can tell us about Yang Gong's treasure house......"

"Can it be replaced by something else? I'll teach you martial arts, the Moon Knife Technique in the Well, and the One Divine Skill that has escaped?" Lu Miaozi said earnestly.

"Who is rare. "Isn't this the martial arts that Kou Zhong and Xu Ziling learned in the original book.

Wan Wan was a little disappointed. I didn't expect Lu Miaozi to refuse to tell the secret of Yang Gong's treasure house, and suddenly his eyes lit up and said: "Senior Lu Miaozi, my eldest brother Yang can still talk to small animals, do you want him to teach you?"

"So amazing?" Lu Miaozi's eyes lit up, and he hurriedly grabbed Yang Dong's sleeve: "Teach me, okay?"

"I'm too lazy to take care of you. Yang Dong was impatient. pulled Lu Miaozi's hand away and strode out of the courtyard gate.

"Who is Brother Yang?" At this time, Wan Wan couldn't help but be curious about Yang Dong's identity, and glanced at the red whisk girl, could it be that Yang Dong is really Yang Su's youngest son? What has he experienced over the years?

Yang Dong came to the outside of the manor, the night breeze was blowing, the full moon was hanging high, the fresh air, the frogs and insects were crying in the tranquility, which made people feel open, and it was really an ideal place to escape from the world.

A lake is sparkling, the concubine is sitting on the shore of the lake, quietly looking at the breeze wrinkled by the lake, the veil is undulating, the face of the country and the city is with a touch of melancholy, and the tightly knit brows make people feel pity.

Moonlight, night scenes, and beauties wearing veils are like beautiful Chinese style paintings.

"Miss Shi. Yang Dong shouted.

"Ah...... Yang Shaoxia. The concubine was startled for a moment, and her voice was a little flustered.

"What do you want to be so engrossed?" Yang Dong sat on the grass next to Concubine Xuan.

"I didn't ...... It's nothing. ”

Concubine Xuan slowly calmed down, but couldn't hide the faint flush on her cheeks, Yang Dong glanced at Concubine Xuan, knew what she was thinking, and said softly: "At the bottom of that pool, I have no choice but to hope that the girl will not mind." ”

"I, I know. Yang Dong suddenly said what he thought in his heart, Concubine Shixuan's cheeks were even redder, her whole body seemed to be wrong, and she didn't know where to put her hand, but the picture of Yang Dong kissing herself at the bottom of the pool lingered in her mind.

"I know the rules of Cihang Jingzhai that you are not allowed to have skin-to-skin relations with men, especially for you, your master is very harsh, but I think that cultivation is to cultivate the mind, not to cultivate the situation, as long as our hearts are pure for each other, then it is not considered to violate the door rules, Miss Shi, what do you say?"

"Yang Shaoxia, don't say it. Concubine Shixuan's voice raised a little, but she couldn't hide her more chaotic heart.

"If the teacher girl can't let go, I'm willing to be responsible for the girl. Yang Dong said seriously.

"No need for Yang Shaoxia......" Concubine Xuan didn't know how to answer Yang Dong's words, and suddenly looked up at Yang Dong's expression, as if she couldn't hold back her laughter, and immediately understood, and said angrily: "You did it on purpose?"

"yes, what's the matter? I told you not to try, you wanted to go, why didn't I drown you. Yang Dong laughed.

The concubine's face was red and her ears were red, and she wanted to pull out the sword from the sheath, only to find that the sword was gone, she glared at Yang Dong fiercely, and said angrily: "Then you can not save it, who is rare." ”

The two sat by the lake for a long time, and Concubine Xuan suddenly said, "Are you really Yang Su's son?"

"What if it is, what if it isn't?" Yang Dong said casually.

"If you are, you might as well be the big boss of the Wagang Army, Yang Su is the Duke of Chu of the Great Sui, a real nobleman, and his identity is much more noble than Li Mi, Wang Shichong, Yu Wenhua and these people, Li Yuan can't compare, if you go to be the big boss of the Wagang Army, not only will the Wagang Army be convinced, but also strengthen the momentum of the Wagang Army.

With Shen Luoyan as the military advisor, the Five Tiger Generals and Li Jing and other fierce generals, it is not impossible for him to dominate the world one day. (To be continued......)