??๋ถํ•œ ํ•ดํ‚น๋ถ€๋Œ€, ์•”ํ˜ธํ™”ํ ์ด ํ•ดํ‚น ์ž๊ธˆ $3b(์•ฝ 3์กฐ 9์ฒœ์–ต์›) ์ถ”์ •


์ด ์ž๊ธˆ์€ ํ•ต ๊ฐœ๋ฐœ์— ์‚ฌ์šฉ๋จ.(ํ•ต ๊ฐœ๋ฐœ์˜ ์ ˆ๋ฐ˜ ๊ฐ€๋Ÿ‰์ด ์•”ํ˜ธํ™”ํ ํ•ดํ‚น์ž๊ธˆ)


์ถœ์ฒ˜