#coding=utf-8
__author__ = 'Nastya'

print("Calc. Ver 0.0.2")

x1 = int(raw_input("Value 1: "))
x2 = int(raw_input("Value 2: "))

while True:
    print("Choose operation:\n*\t/\t+\t-")
    operation = raw_input(">> ")

    result = None
    if operation == '+':
        result = x1 + x2
    elif operation == '-':
        result = x1 - x2
    elif operation == '*':
        result = x1 * x2
    elif operation == '/':
        result = x1 / x2

    print "Res:", str(result)