#
# Sep 16 homework 
# chap 2 exercise 10, pg 50
# Jim Mahoney's example solution.
#

def mainly_main():
    print("-- chap2ex10.py --")
    print("Convert mm/month to miles/hour.")
    print("(Wikipedia says hair growth is ~ 125mm/month.)")
    mm_per_month = float(input("What is the speed in mm/month? (i.e. 125) "))
    # To get the conversion factor, type "miles/hour in mm/month" into Google.
    print("In miles/hour that is", (8.50628972e-10 * mm_per_month))

mainly_main()