while True:
    number1 = float(input("Enter first number: "))
    mode = input("Select action: ")
    number2 = float(input("Enter second number: "))

    match mode:
        case "*":
            print("Result: ", number1 * number2)

        case "/":
            print("Result: ", number1 / number2)

        case "+":
            print("Result: ", number1 + number2)

        case "-":
            print("Result: ", number1 - number2)