can't seem to multiply by a float?

There is the base code that is used to interface with a program called link2fs. It can send airspeeds for example and split up to the different parts. Im trying to learn how to interface with the stepper using the stepperdriver library. The code i wrote sort of works as in the gauge rotates its just the calibration cant seem to work out. Thats where i need the help, Thank you :slight_smile: