c++ programing

You are driving to Canada and all of a sudden the speed limit goes from 55 MPH to 90 KPH when you cross over the border. What the heck. How fast is 90 KPH in MPH????? Should you slow down or speed up. You should write a program where you enter the KPH and it converts it to MPH. The key factor to use is 1 Kilometer = 0.621371 Miles. Use a Constant for the Conversion Value. FYI, every car has the KPH on the speedometer in little numbers.