For starters, and I don't mean to sound smart, but if it has 8 ft for its length, width and height, it is a cube. And the formula you use to find the volume of a cube is V=a^3, a being one side. So, now all you have to do is multiply 8 three times which is 512. So, the volume of the cube is 512 feet squared.
Hope this helped you understand more!
