import gradio as gr

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

demo = gr.Interface(
    calculator,
    [
        gr.Number(label="First Number"),
        gr.Dropdown(label="Operator", choices=["+", "-", "*", "/"]),
        gr.Number(label="Second Number")
    ],
    gr.Textbox(label="Result"),
    title="Simple Calculator",
    description="A simple calculator that performs basic arithmetic operations."
)

if __name__ == "__main__":
    demo.launch()