#!/usr/bin/env python
operators = ['+', '-', '/', '*']
while True:
    print 'Which operator do you want? (Enter any other number to quit)'
    for op in operators:
        print "%i: %s" % (operators.index(op), op)
    use = int(raw_input('Which operator do you want? '))
    if use > len(operators):
        break
    first = float(raw_input('Enter your first number: '))
    second = float(raw_input('Enter your second number: '))
    print 'Your answer is: ',
    if operators[use] == '+':
        print first + second
    elif operators[use] == '-':
        print first - second
    elif operators[use] == '/':
        print first / second
    elif operators[use] == '*':
        print first * second
print 'Thanks for using'