I am trying to make the product of two int[][] (matrices).

If I have the two matrices a and b I would like to calculate matrix c which
is the product of a and b:
In this example I use two matrices with length 2 that contains the same
numbers.

a: 1 2      b:1  2        =  c:  7  10
  3 4          3 4               15  22

Here I create matrix a and matrix b:

   int[][] a = new int[2][2];
   int[][] b = new int[2][2];

   int fill = 1;
   for (int i = 0; i < 2; i++){
     for (int k = 0; k < 2; k++){
       a[i][k] = fill;
       b[i][k] = fill;
       fill++;
     }
   }

Here I try yo make the calculation:

   int result = 0;
   int result2 = 0;
   int[]store = new int[4]; // Where I store the values of the product
matrix x.

   for (int m = 0; m < 2; m++){
     for (int n = 0; n < 2; n++){
       result = result + (a[m][n] * b[n][m]);
     }
     result2 = result;
     store[m*m] = result2; // 7 and 22 get stored in my array.
     result = 0;
   }
 }
}

But I can only seem to calculate "7" and "22"! Does anybody have a hint for
how to get the other two result of c calculated??