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


demo = gr.Interface(
    fn=calculator,
    inputs=[
            gr.Number(value=4), 
            gr.Radio(["+", "-", "*", "/"]), 
            "number"
            ],
    outputs="number",
    examples=[
        [5, "add", 3],
        [4, "divide", 2],
        [-4, "multiply", 2.5],
        [0, "subtract", 1.2],
    ],
    title="test calculator",
    description="heres a sample **toy calculator**. enjoy!",
)

demo.launch()