The maximum volume that Tom can fit in the box is 144 in^3. We know that the formula for the volume of the box is V=l*w*h, so when you plug in the numbers from the problem, it becomes V=6*6*4. When you multiply those numbers, you get 144. When you add your units, the answer is 144 in^3. If you need any more help or any clarification, please let me know and I will be happy to help!