import gradio as gr

def hello_world(input_text):
    return f"{input_text} Hello World!"

def setup_interface():
    with gr.Blocks() as demo:
        gr.Markdown("### 입력 값을 넣으세요:")
        
        with gr.Row():
            input_text = gr.Textbox(placeholder="여기에 입력하세요...", label="입력")
            output_text = gr.Textbox(label="결과")
        
        input_text.change(hello_world, inputs=input_text, outputs=output_text)
    
    return demo

demo = setup_interface()
demo.launch()