How many loaded pallets in the shape of 1-meter cubes could you ship in a railroad boxcar that has inner dimensions 3 meters wide by 15 meters long by 4 meters high?

Where is the diagram

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.