What do you mean "move decimals"?
If you multiply it, you get -4
If you multiply it, you get -4
-
-8.0
*0.5
---------
-4.0
0 0
---------
-04.0
or just -4
*0.5
---------
-4.0
0 0
---------
-04.0
or just -4
-
You wouldn't have to move the decimals.