Everyone knows that the number of Indians is good. They are good at using images, complements and other methods to simplify the operation. Their brains are like calculators, which can calculate the product of 99×99 in a few seconds. India's rapid development in software development, e-commerce and knowledge-intensive industries benefits from its good mathematical tradition and distinctive mathematical calculation methods. In Japan and South Korea, the topic of "Indian Mathematics" is all the rage and becomes the representative of the trend. Office workers read various manuals of "Indian Mathematics" on the subway instead of cartoons. Many rich families specially invite people who know Indian mathematics to be tutors and let their children receive "Indian education". Where is the magic of Indian mathematics? Is it really a secret that Indians don't know? Are Indians really all mathematical geniuses? In fact, the reason why Indians can calculate multiple numbers quickly and accurately and recite the multiplication table of 99× 99 is because they adopt simpler operation methods. You know, this is not a cramming recitation, which hides many interesting arithmetic tricks of Indian mathematics. As long as we change our thinking and methods of solving problems, everything will become easier. Compared with those of us who adhere to the traditional algorithm, they took a shortcut and reached the finish line faster.