def mulyiplyList(ISBNNumber):
    print("result = 1")
    result = 1
    for x in ISBNNumber:
        print("for loop")
        result = int(x) * 3
        print(result)
    return result
    result = False
    if result[11] == True:
        print("return result")
    elif result[12]:
        print(no)

print("Please enter the ISBN number")
ISBNNumber = input("?")
mulyiplyList(ISBNNumber)
