Answer :
When you are trying to find how much something fits in a specific place you are looking for volume. Volume=length x width x height. Therefore you would substitute your given into the formula.
3.9 x 2.1 x 2.5 and get 20.475.
Hope this is useful :)
3.9 x 2.1 x 2.5 and get 20.475.
Hope this is useful :)