4 9 2 x 4x+9y+2z
3 5 7 * y = 3x+5y+7z
8 1 6 z 8x+y+6z
4
9
2
  
1
  
4+9+2=15
      
1
3
5
7
*
1
=
3+5+7=15
=
15
*
1
8
1
6
  
1
  
8+1+6=15
      
1

 
x y z * 4 9 2 = 4x+3y+8z 9x+5y+z 2x+7y+6z
3 5 7
8 1 6

 
1 1 1 * 4 9 2 = 4+3+8=15 9+5+1=15 2+7+6=15 = 15 * 1 1 1
3 5 7
8 1 6