1. Find VolumeParallelepiped(A,B,C)
`A=(1,2,3)`,`B=(3,0,6)`,`C=(7,1,9)`

Solution:
Here `vec A=(1,2,3),vec B=(3,0,6),vec C=(7,1,9)`


Volume `=|vec C * (vec A xx vec B)|`

1. Calculate scalar triple product
`C*(A xx B)`

`=|[C_1,C_2,C_3],[A_1,A_2,A_3],[B_1,B_2,B_3]|`

`=|[7,1,9],[1,2,3],[3,0,6]|`

`=7(2xx6-3xx0)-1(1xx6-3xx3)+9(1xx0-2xx3)`

`=7(12-0)-1(6-9)+9(0-6)`

`=7(12)-1(-3)+9(-6)`

`=84+3-54`

`=33`

2. Calculate parallelepiped volume
Volume `=33`