dct = {"+" : lambda x,y: x + y, "-" : lambda x,y: x - y, "*" : lambda x,y: x * y, "/" : lambda x,y: x / y }
def f (digit_1, digit_2, sign):
    print(dct[sign](digit_1, digit_2))
digit_1, digit_2 = [int(i) for i in input().split()]
sign = input()
f(digit_1, digit_2, sign)