[Programmers] LV2. 행렬의 곱셈

// LV2. 행렬의 곱셈
public static int[][] solution_matrix_multiple(int[][] arr1, int[][] arr2) {
    int[][] answer = new int[arr1.length][arr2[0].length];
    for(int i=0;i<arr1.length;i++){
        for(int j=0;j<arr2[0].length;j++){
            answer[i][j] = 0;
            for(int k=0;k<arr2.length;k++){
                answer[i][j] += (arr1[i][k]*arr2[k][j]);
            }
        }
    }
    return answer;
}