num1 =float(input("Enter first number: "))
op =input("Enter operator: ")
num2 =float(input("Enter second number: "))


if op == "+":
    print(num1+num2)
elif op == "-":
    print(num1-num2)
elif op == "/":
    print(float(num1/num2))
elif op == "*":
    print(num1*num2)
else:
    print("invalide operator")