x 20
20 x 1 = 20
20 x 2 = 40
20 x 3 = 60
20 x 4 = 80
20 x 5 = 100
20 x 6 = 120
20 x 7 = 140
20 x 8 = 160
20 x 9 = 180
20 x 10 = 200
20 x 11 = 220
20 x 12 = 240
20 x 13 = 260
20 x 14 = 280
20 x 15 = 300
20 x 16 = 320
20 x 17 = 340
20 x 18 = 360
20 x 19 = 380
20 x 20 = 400