PYTHON - Simple Calculator print("RoCk StAr DeViL") while True: print("Options:") print("Enter 'add' to add two numbers") print("Enter 'subtract' to subtract two numbers") print("Enter 'multiply' to multiply two numbers") print("Enter 'divide' to divide two numbers") print("Enter 'quit' to end the program") user_input = input(":") if user_input == "quit": break elif user_input == "add": num1 = float(input("Enter a number: ")) num2 = float(input("Enter another number: ")) result = str(num1 + num2) print("The answer is " + result) elif user_input == "multiply": num1 = float(input("Enter a number: ")) num2 = float(input("Enter another number: ")) result = str(num1 * num2) print("The answer is " + result)...