100 multiplied by 100 equals what?
When we multiply any number by 100, each digit in that number becomes 100 times larger. In this question, the number 100 is being multiplied by 100. So the digits in 100 are going to become 100 times larger. The ones digit increases by 100 times and it shifts two places to the left. And all the digits behave in the same way. The tens digit shifts two places to the thousands column. And the hundreds digit now becomes worth one lot of 10000. Finally, we need to include two zeros as placeholders to show that the digits have shifted two places.
If we multiply any number by 100, its digits shift two places to the left. So if we multiply 100 by 100, the answer is 10000.