Use 2dimensional arrays to represent matrices Solution import java.util.*; import java.lang.*; import java.io.*; class lab5c { public static void main (String[] args) { int[][] A = {{10,55,4,89,39},{45,9,49,98,23},{4,8,90,23,9},{8,37,80,2,31}}; int[][] B = {{40,1,16},{90,3,7},{9,2,22},{44,35,60},{18,67,21}}; int[][] C = {{0,0,0},{0,0,0},{0,0,0},{0,0,0}}; int sum = 0; for(int i=0;i<=4;i++) { sum = sum + A[2][i] * B[i][1]; System.out.println(sum); } C[2][1] = sum; System.out.println(\"C[2][1] = \"+C[2][1]); } } output:.