def dog_years(human_years):
    return human_years * 7

def dog_stats():
    print "Fido is the name of the dog"
    print "He is a good dog"

def interest_calculator(money, rate_percent):
    rate = rate_percent * .01
    return money * rate

def advanced_dog_stats(years):
    dog_stats()
    print "He is " + str(dog_years(years)) + " years old"