a rectangular prism with a volume of 4 cubic units is filled with cubes with the side lengths of 1/3. How many 1/3 unit cubes does it take to fill the prism?

I think it’s 108 because volume of each cube is 1/27 (1/3 x 1/3 x 1/3) and then I did 4 divided by 1/27 which turns out to be 4 x27 which is 108. Hope this helps!!