Answer :
35 x 69
35 = 30 + 5
69 = 60 + 9
30 x 60 = 1800
30 x 9 = 270
5 x 60 = 300
5 x 9 = 45
1800 + 270 + 300 + 48 = 2415
35 = 30 + 5
69 = 60 + 9
30 x 60 = 1800
30 x 9 = 270
5 x 60 = 300
5 x 9 = 45
1800 + 270 + 300 + 48 = 2415