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def add(x, y): return x + y def subtract(x, y): return x - y def multiply(x, y): return x * y def divide(x, y): if y != 0: return x / y else: return "Cannot divide by zero" while True: print("Options:") print("Enter 'add' for addition") print("Enter 'subtract' for subtraction") print("Enter 'multiply' for multiplication") print("Enter 'divide' for division") print("Enter 'quit' to end the program") user_input = input(": ") if user_input == "quit": break elif user_input in ["add", "subtract", "multiply", "divide"]: num1 = float(input("Enter first number: ")) num2 = float(input("Enter second number: ")) if user_input == "add": print("Result:", add(num1, num2)) elif user_input == "subtract": print("Result:", subtract(num1, num2)) elif user_input == "multiply": print("Result:", multiply(num1, num2)) elif user_input == "divide": print("Result:", divide(num1, num2)) else: print("Invalid input")