12" x 8" x 12" is a 3 dimensional figure. With those 3 dimensions (LxWxH) you can calculate CUBIC inches or CUBIC feet. (and if you're really feeling creative, convert into LITRES!!) In order to find the square inches on one of the sides of your cube, multiply L x W. To find square feet on one side of your cube ( L/12) x (W/12).
