Why is 63 divided by 0.1 greater than 63?

It is because... well lets work the problem and see what happens.

63 divided by 0.1 is 63 divided by 1/10.

63 divided by 1/10 is 63 multiplied by 10/1, or 10

63 x 10 is 630.

Lets check if its correct.

630

x0.1

------

63.0

I hope it makes you understand.