num1 = float(input( "please enter the first number: "))
operator = input( "please enter the operator: ")
num2 = float(input( "please enter the second number: "))

if operator == "+":
     print(num1 + num2)
elif operator == "-":
     print(num1 - num2)
elif operator == "/":
      print(num1 / num2)
elif operator == "*":
      print(num1 * num2)
elif:
     print("wrong operator please try again")