Multiply Question

Hi gurus,

I am new to ABAP, and I need to change this sentence:

ADD X TO Y

in the way that in variable y i have x*y. I have look at the different commands, and I guess this could be something similar to this:

MULTIPLY X by Y....my problem is....the result of the multiplication, where is it saved? How can I saved it?

Thanks a lot,

Regards