>>64
public int[][] multiply( int[][] a, int[][] b ) {
// 答えの行列の確保
int ROWS = a.length;
int COLS = b[0].length;
int[][] answer = new int[ROWS][COLS];
// 計算
for( int i=0; i<ROWS; i++ ) {
for( int j=0; j<COLS; j++ ) {
for( int k=0; k<a[0].length; k++ ) {
answer[i][j] += a[i][k] * b[k][j];
}
}
}
return answer;
}