What is printed when the following program is executed?

public class MultiplyPrint {
    public static void printMultiplied(int[][] arr, int i, int j, int factor) {
        if (i == arr.length) return;
        if (j == arr[i].length) {
            System.out.println();
            printMultiplied(arr, i + 1, 0, factor);
            return;
        }
        System.out.print(arr[i][j] * factor + " ");
        printMultiplied(arr, i, j + 1, factor);
    }
    public static void main(String[] args) {
        int[][] grid = { {1, 2}, {3, 4} };
        printMultiplied(grid, 0, 0, 2);
    }
}