According to my undstanding , she encourages students to use mulflication table ( 구구단 ) & long division ( 12 이상수 로 나누 는 나눗셈 - 미 영국 에 는 12 단 까지 함 ) Also , now I have understood why many collage students in USA use a confused and complicated method to solve math Q . ( I heard they have difficulty in understanding and using a simply way )