* 6 7

42

class Calculator:
    def compute(self, op, a, b):
        if op == '+':
            return a + b
        elif op == '-':
            return a - b
        elif op == '*':
            return a * b
        else:
            return a / b

parts = input().split()
calc = Calculator()
print(calc.compute(parts[0], int(parts[1]), int(parts[2])))