The container is 45 ft long 45 ft wide and 25 ft high what is the volume

A rectangular prism is like a box.
The volume is given by
V = l*w*h
Estimate
V = 50ft * 50ft * 20ft = 50000 ft^3
Actual
V = 49 ft* 45 ft* 25 ft
V = 55125 ft^3
The estimate is close to the actual so the answer is reasonable.