To convert to MPH, you buy a hewlet packard hp50g calculator and enter the number then go to the velocity menue and find the appropriate units.
aint that how in-gan-ears do it?
Maybe the newbies and the wet-behind-the-ears twerps.
When I was going to school, the HP-41C had just come out. To prevent cheating, many professors responded to the programmable calculator by changing all the numbers on tests to be some multiple of 1, 2, 5 or 10, so that the arithmetic on the test became very east to do by hand. Then they increased the amount of reckoning you needed to do to get the answer.
The last thing they did was make everyone memorize constants: pi, e, natural and common logs of 0 through 10, and all manner of natural constants.
FPS to MPH was one of those constants.
Still, I keep my HP-41CV to this day. I intend to be buried with it.