import gradio as gr

def calculator(num1, num2, operation):
    if operation == "add":
        return num1 + num2
    elif operation == "subtract":
        return num1 - num2
    elif operation == "multiply":
        return num1 * num2
    elif operation == "divide":
        if num2 == 0:
            return "Error: Division by zero"
        return num1 / num2
    else:
        return "Invalid operation"

# Define the Gradio interface
iface = gr.Interface(
    fn=calculator,
    inputs=[
        gr.Number(label="Number 1"),
        gr.Number(label="Number 2"),
        gr.Radio(["add", "subtract", "multiply", "divide"], label="Operation")
    ],
    outputs=gr.Textbox(label="Result"),
    title="Simple Calculator",
    description="A simple calculator to perform basic arithmetic operations."
)

# Launch the interface
iface.launch()