John builds a box. The box is 26 inches by 26 inches by 14 inches. The walls are 1 inch thick on each side. How much is the internal volume in cubic feet?
Let's think step by step below.
4
The walls take away 2 * 1 = 2 inches from each dimension.

So the longer sides are 26 - 2 = 24 inches.

That is 24 / 12 = 2 feet.

The smaller dimension is 14 - 2 = 12 inches.

That is 12 / 12 = 1 foot.

So the internal volume is 2 * 2 * 1 = 4 cubic feet.

.

Therefore, the answer is 4