From the first grid is 1 grain of rice, the next grid is twice as large as the previous grid, and the chessboard has ***64 grids, we can get the formula:

1+2+4+8+ 16+32+......+9223372036854800000=2^0+2^ 1+2^2+……+2^63=

1844674073709551615 (granules)

PS: Multiplication and accumulation are used here.

Original story:

Legend has it that a man in ancient India invented a board game with 64 squares, which was very novel and interesting to play. He presented this kind of chess to the king. The king had a good time, so he ordered the players to be rewarded. I asked the chess player what he wanted. The chess player said: He only needs food. He is satisfied by asking the king for some food. Asked how much food he needed, he said he only asked for one grain of rice in the first grid, two grains of rice in the second grid and four grains of rice in the third grid. In short, the rice in the back cell is twice as much as that in the front cell, and all 64 cells are filled. Hearing this, the king readily agreed. Ministers also think that this rice is nothing, so they will lead chess players to get rice. Unexpectedly, this is not enough to pay for all the rice stored in the warehouse.

Power:

The operation of finding the product of n identical factors is called power, and the result of power is called power. Where a is called radix and n is called exponent. When a. When it is regarded as the result of the n power of A, it can also be read as "the n power of A" or "the n power of A"