import java.util.Arrays;

public class ScalarMult
{
    public static void main()
    {
        double [][] a =  { {1, 8, -3},
                           {4, -2, 5} };
                         
        double[][] b;
        
        b = scalarMultiply(a, 2);
        
        System.out.println( Arrays.toString(a[0]) );
        System.out.println( Arrays.toString(a[1]) );
        System.out.println( " * " + 2 + " = " );
        System.out.println( Arrays.toString(b[0]) );
        System.out.println( Arrays.toString(b[1]) );
        
    }

    public static double[][] scalarMultiply(double[][] m, double a) 
    {
        double[][] result = new double[m.length][m[0].length];
                            // result matrix has
			    // same # rows and # columns as m
    
        for (int i = 0; i < m.length; i++) 
        {
            for (int j = 0; j < m[0].length; j++) 
            {
                result[i][j] = m[i][j] * a;
            }
        }

        return result;
    } 

}