WE HAVE SO MUCH CHOCOLATE PREPARED FOR THE PARTY THAT WE HAD TO PUT...

7. We have so much chocolate prepared for the party that we had to put it all in boxes and arrange the boxes in this pile, which is 4 boxes high, 5 boxes wide, and 5 boxes long: Soon we saw that some boxes of chocolate were missing−someone just loved our chocolate! How many boxes of chocolate do we have now?