0003(´𓇺𔓑𓇺`)垢版 | 大砲2022/11/20(日) 16:55:04.055ID:XJVYVJGIdHAPPY (a/b)/(c/d) =(a*d/b)/(c*d/d) =(a*d/b)/(c) =(a*d/(b*c))/(c/c) =(a*d)/(b*c) =(a/b)*(d/c)