https://blog.gongquiz.com/2021/11/07/500g-%ec%9d%98-%ec%8b%9d%eb%b9%b5%ec%9d%84-2%ea%b0%9c-%eb%a7%8c%eb%93%a4%eb%a0%a4%ea%b3%a0-%ed%95%9c%eb%8b%a4-%ec%b4%9d-%eb%b0%b0%ed%95%a9%ec%9c%a8%ec%9d%80-180%ec%9d%b4%ea%b3%a0-%eb%b0%9c%ed%9a%a8/