son1, amal, son2 = input("").split()

son1 = int(son1)
son2 = int(son2)

if amal == '+':
    print(son1 + son2)
elif amal == '-':
    print(son1 - son2)
elif amal == '*':
    print(son1 * son2)
elif amal == '/':
    print(son1 / son2)
else:
    print("Notog'ri amal!")





