When you multiple decimals do you include a zero?

When you multiply decimals you do not have to add a zero just
Iine then up normally and move the decimal out how ever many places you need to or you can add a zero and still move the decimal out how ever many places you'd need to.

It dependents if it like 5.034 or.085 then yes but if it is .5 or. 5000 you do not have to but you can if you want to.