okay so tell I am going to multiply 1xn with nxn,i.e for multiplying 1xn with nxn,

             |1 2 3|
|3 2 1| x |0 1 0| = 3 times the first row+2 times the second row +1 time the third row=
             |2 0 0|

                    |3 6 9|+|0 2 0|+|2 0 0|=|5 8 9|

and all of that depends on the structure you are using for your matrix.

_____________
Mehdi.
software student.