Will anyone be kind enough to help me comprehend the Questions 46 and 47 in the attached (Bitmap image) question below:

I attempted Question 45:

I multiplied the number of larger boxes for each ship type by 4 and attempted to subtract 12 from each.

I deduced that theNavy Shipcan carry 12 smaller boxes with the least amount of room left over:

5 x 4 = 20 - 12 = 8-room left over in terms of smaller boxes)