import gradio as gr

def cal(number_1,op,number_2):
    if op == 'add':
        return number_1 + number_2
    if op == 'sub':
        return number_1 - number_2

demo = gr.Interface(
fn=cal,
inputs=[
    gr.Number(value=0, label="First Number"),
    gr.Radio(['add','sub']),
    gr.Number(value=0, label="Second Number")
],
outputs='number',
examples=[
    [6, 'add', 7],
    [7, 'sub', 3]
],
description="Addition and Sub Calculator"
)
demo.launch()