Python help! I need help getting my code to increment the value. It keep calculating the range over the same number and not moving up! this is the question

Write a program named q1() that prompts the user for the starting and ending distance in Kilometers (km), and an increment value. It should then print the conversion table showing values for Kilometers, Miles (M) and Feet (ft). Each value should be displayed as they are calculated.

and this is the code i have right now

start_km = input("Enter the Starting Kilometers (km): ") start_km = int(start_km) end_km = input("Enter Ending Kilometers (km): " ) end_km = int(end_km) increment = input("Increment value: ") increment = int(increment) km = start_km M = km*(.621371) ft = M*(5280) print("km", " ", "M", " ", "ft") print("==========================") for i in range(start_km,end_km+1,increment): print( km, " ", M, " ", ft)