回复：各位大侠，请教一个数学问题：

 

Don't know, but computer says all 7 cases are:

 1 3 8 x 4 2 = 5 7 9 6
 1 5 7 x 2 8 = 4 3 9 6
 1 5 9 x 4 8 = 7 6 3 2
 1 8 6 x 3 9 = 7 2 5 4
 1 9 8 x 2 7 = 5 3 4 6
 2 9 7 x 1 8 = 5 3 4 6
 4 8 3 x 1 2 = 5 7 9 6