a = int(input())
b = int(input())
c = (input())
if c == '/' and b != 0:
    print(a / b)
elif c == '+':
    print(a + b)
elif c == '*':
    print(a * b)
elif c == "-":
    print(a - b)
elif b == 0 and c =='/':
    print('На ноль делить нельзя!')
else:
    print('Неверная операция')