None of those make sense. The volume of a cube is a^3. If each side is 13 inches then the formula would be 13^3 which is 2197in^3.
Not sure if there was a picture with this but if there is more than one cube in the picture (I assume this is the case), then the volume would be the formula
V=whl
If you know the dimensions of the prism from the cubes in the diagram (which I cannot see), then you should be able to calculate the volume of the rectangular prism.
If you post the picture I can help you more.
