Question 252751
Here are few things you need to know before you can calculate this
:
The inside dimensions of the 53' trailer, so you can find the usable volume
:
The size of of pallets, 
The height of a loaded pallet (if you stack more than 1 level)
:
Can the pallets fill the width exactly if they are side-by-side (how many)
:
Can the pallets fill the length exactly? (how many)
:
If they exactly fill the trailer, width and lengthwise, only one level.
:
no. of pallets = {{{(trailer length * width)/(pallet length * width)}}}