์ •๋ณด๊ธ€์ด 2.4๋ฒ„์ „๊บผ๋ผ ๊ทธ๋Ÿฐ์ง€ ์•„์ง๋„ ์œ ํšจํ•œ๊ฑด์ง€ ์ž˜ ๋ชฐ๋ฃจ๊ฒŸ์–ด