It's 4 and u should know that by now.
There’s not actually a question. But I might be able to help if u show the full problem
We want to get rid of the stuff in the denomenator
gcd of the denomenator is 2x
but wait, we can get rid of the deonmenator in the numerator by multiplying by 4x
muliplty the whole thing by 4x/4x
we get
Volume= length times width times height