for(i = 0; i<3; i++){
for(j = 0; j<2; j++){
C[i][j] = 0;
for(k = 0; k<3; k++){
C[i][j] = C[i][j] + A[i][k] * B[k][j];
}
printf("%d ",C[i][j]);
}
printf("\n");
}