500
If one corner of a truck is 5 feet in the x direction from the corner of the garage, 6 feet in the y direction from the corner of the garage, and 7 feet above the ground (z direction) while its opposite corner is 14 feet from the corner of the garage in the x direction, 42 feet in the y direction, and is 19 feet above the ground, what is the largest item that can fit in the truck?
What is 39 feet?