A mathematical term in the form of a× 10 to the power of n. A number is expressed as (a×/kloc-0 to the power of n), where 1 ≤| a | < 10, where n stands for an integer, which is called scientific counting method. In the form of power, it is sometimes convenient to express some large numbers encountered in daily life, such as: the speed of light is about 300,000,000 m/s; The world population is about 6,654.38 billion. It is inconvenient to read and write such a large number in physics. Considering that the power of 10 has the following characteristics, the power of 10n is general, and there are n zeros after 1, so some large numbers can be expressed by the power of 10, such as 6 100 000 = 6.