(пример)
1) 5 1 5
-- х -- = ---
9 6 54
2) 5 5 25
--- х --- = -----
54 18 972
3) 1 2 2 1
--- х --- = --- = ----
18 3 54 27
4) 1 1 1
--- х --- = ----
27 9 243
5) 25 1 25 х 243 25 х 1 1
----- : ----- = -------------------- = --------------- = 6 ---
972 243 972 х 1 4 х 1 4