1. ์‚ฌ์ด์ฆˆ๋Š” ๊ฐ€๋กœ 490 x ์„ธ๋กœ 420 ์ด ์‚ฌ์ด์ฆˆ๊ฐ€ ๊ฐ€์žฅ ํฐ ์‚ฌ์ด์ฆˆ์ž„?

2. ์ƒ‰์ƒ์ด 2๊ฐœ ์žˆ๋˜๋ฐ ์„ฑ๋Šฅ ์ฐจ์ด ์—†์ด ๊ทธ๋ƒฅ ์ƒ‰์ƒ๋งŒ 2๊ฐœ์ธ๊ฑฐ์ž„?