HW7.6

 import java.util.Scanner;

 public class Solution
 {
     public static void main(String[] args)
     {
         Scanner input = new Scanner(System.in);
         int[][] matrix1 = new int[3][3];
         int[][] matrix2 = new int[3][3];
         int[][] matrixSum = new int[3][3];
         System.out.print("Enter matrix1: ");
         for(int i = 0; i < 3; i++)
             for(int j = 0; j < 3; j++)
                 matrix1[i][j] = input.nextInt();
         System.out.print("Enter matrix2: ");
         for(int i = 0; i < 3; i++)
             for(int j = 0; j < 3; j++)
                 matrix2[i][j] = input.nextInt();
         input.close();

         System.out.println("The matrices are muliplied as follows");
         int[][] matrixProduct = muliplyMatrix(matrix1, matrix2);

         System.out.println(matrix1[0][0] + " " + matrix1[0][1] + " " + matrix1[0][2] +
                 "     " + matrix2[0][0] + " " + matrix2[0][1] + " " + matrix2[0][2] +
                 "     " + matrixSum[0][0] + " " + matrixSum[0][1] + " " + matrixSum[0][2]);
         System.out.println(matrix1[1][0] + " " + matrix1[1][1] + " " + matrix1[1][2] +
                 "  *  " + matrix2[1][0] + " " + matrix2[1][1] + " " + matrix2[1][2] +
                 "  =  " + matrixSum[1][0] + " " + matrixSum[1][1] + " " + matrixSum[1][2]);
         System.out.println(matrix1[2][0] + " " + matrix1[2][1] + " " + matrix1[2][2] +
                 "     " + matrix2[2][0] + " " + matrix2[2][1] + " " + matrix2[2][2] +
                 "     " + matrixSum[2][0] + " " + matrixSum[2][1] + " " + matrixSum[2][2]);
     }

     public static int[][] muliplyMatrix(int[][] a, int[][] b)
     {
         int[][] outcomeMatrix = new int[3][3];
         for(int i = 0; i < 3; i++)
         {
             for(int j = 0; j < 3; j++)
             {
                 outcomeMatrix[i][j] += a[i][j] * b[j][i];
             }
         }
         return outcomeMatrix;
     }
 }