Final answer:
The amount of space inside the fort is 0.5625 cubic meters.
Step-by-step explanation:
To determine the amount of space inside the fort, we need to calculate the volume of the box. The volume of a rectangular box is given by multiplying its length, width, and height. In this case, the length is 0.75 m, the width is 0.5 m, and the height is 1.5 m. So, the volume is:
volume = length × width × height
= 0.75 m × 0.5 m × 1.5 m
= 0.5625 cubic meters
Therefore, the amount of space inside the fort is 0.5625 cubic meters.