I thought you said these problems were all different. They look exactly the same to me.
Figure the volume of one of the small blocks, and use that to divide into the whole volume.
3 1/4 = 13/4 so the box has a volume of 13/4 * 3 * 1 = 39/4 ft^3
each small block has a volume of (1/4)^3 = 1/64 ft^3
(39/4) / (1/64) = 624
Hope this helps love.
-Joker7721
This is the explanation.
