100000000
8 zeros
its a bit like adding the number of zeros
10000x10000=100000000
1x1 = 1 10x10 = 100 100x100 = 10,000 1,000x1,000 = 1,000,000 10,000x10,000 = 100,000,000 100,000x100,000 = 10,000,000,000 1,000,000x1,000,000 = 1,000,000,000,000 10,000,000x10,000,000 = 100,000,000,000,000 100,000,000x100,000,000 = 10,000,000,000,000,000 1,000,000,000x1,000,000,000 = 1,000,000,000,000,000,000 Simply count up all the zeroes then put a one in front.