There is a similar shortcut for multiplying decimal numbers by numbers such as 10, 100, and 1000: Move the decimal point to the right as many places as there are zeros in the factor. Move the decimal point one step to the right (10 has one zero). Move the decimal point two steps to the right (100 has two zeros).
I believe C. Because it provides a more meaningful explanation
A number that is greater than 714,587 is 1,000,000
I think it might be the second option
You can use a calculator online you know? It is 21.3
