์ง„์งœ ๊ณผํ•™๋„ ์•„๋‹ˆ๊ณ  ๋ฆฌํ”Œ์ด ์˜ค๋ฅธ๋‹ค = ํ•˜๋ฝ์žฅ ์‹œ์ž‘์ž„