2.0 inches times 4 feet/inch

8 feet

The inches cancel top and bottom and you end up with 8 feet.

This is not a unit conversion really. It is more likely a scale drawing.
For example if my drawing of my room floor is 5 inches by 6 inches
the floor would be
5 inches * ( 4 ft/inch) = 20 feet
by
6 in * 4 ( ft/in) = 24 ft

Thank you for the clarification. The calculation is indeed based on a scale factor, where each inch in the drawing represents 4 feet in reality. This helps ensure accurate measurements and proportions when representing larger objects or areas in smaller scale drawings.