import gradio as gr

def calculator(input_text):
    try:
        return str(eval(input_text))
    except:
        return "Error"

def update_input(input_text, new_value):
    if new_value == "C":
        return ""
    elif new_value == "=":
        try:
            return str(eval(input_text))
        except:
            return "Error"
    else:
        return input_text + new_value

with gr.Blocks() as iface:
    gr.Markdown("# Simple Calculator")
    
    with gr.Row():
        input_display = gr.Textbox(value="", label="Display")
    
    button_layout = [
        ["7", "8", "9", "/"],
        ["4", "5", "6", "*"],
        ["1", "2", "3", "-"],
        ["0", ".", "C", "+"],
        ["="]
    ]
    
    for row in button_layout:
        with gr.Row():
            for button in row:
                btn = gr.Button(button)
                btn.click(update_input, inputs=[input_display, btn], outputs=input_display)

iface.launch()