If you would like to know the volume of the box, you can calculate this using the following steps:
1 foot = 12 inches
1.5 feet = 18 inches
volume = length * width * height = 14 inches * 1.5 feet * 7 inches = 14 * 18 * 7 = 1764 inches^3
The volume of the box is 1764 inches^3.