u*(vxw)=

(uxv)*w=

| 2 3 0|=3

| 0 0 1|

| 1 0 0|

v x w = (0-1)i - (0 -1)j + (0 - 1)k

= - i + j - k

u . (v x w) = (2, 3, 0) . (-1, 1, -1)

= -2 + 3 + 0

= 1