1/2 foot is 6 inches 6 times the amount of sides the cube has (6) would be 36 square inches so take that by the amount of boxes can fit(378) would give you the answer of 13,608
(p.s i am only in middle school i kind of understand this and i think this is right but if not i am 100% sorry)
3 goes into 5 one time
Hope this helped :)
You subtract the numerator from the exponent and you then answer it as a regular exponent. Hope this helps and its not to confusing have a great day and tell me if you need me to clarify this a little more :)