import gradio as gr

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

iface = gr.Interface(
    fn=calculator,
    inputs=[
        gr.Number(label="First Number"),
        gr.Radio(["+", "-", "*", "/"], label="Operation"),
        gr.Number(label="Second Number")
    ],
    outputs=gr.Number(label="Result"),
    title="Simple Calculator",
    description="Enter two numbers and choose an operation to perform basic arithmetic.",
    examples=[
        [5, "+", 3],
        [10, "-", 4],
        [6, "*", 7],
        [15, "/", 3]
    ]
)

iface.launch()