15 1 8 3 23 2
------- = 7----- ------- = 1 ----- -------- = 3-------
2 2 5 5 7 7
50 5 43 7 69 9
------- = 5 ------ ------ = 3 ------ ------ = 3 -----
9 9 12 12 20 20
提交 重置