(50000-1397,3):(20,4+33,603)=900
1) 50000-1397,3=48602,7
2) 20,4+33,603=54,003
3) 48602,7 : 54,003=900
(50000-1397,3):(20,4+33,603)=900
1) 50000-1397,3=48602,7
2) 20,4+33,603=54,003
3) 48602,7 : 54,003=900