x 1
1 x 1 = 1
1 x 2 = 2
1 x 3 = 3
1 x 4 = 4
1 x 5 = 5
1 x 6 = 6
1 x 7 = 7
1 x 8 = 8
1 x 9 = 9
1 x 10 = 10
1 x 11 = 11
1 x 12 = 12
1 x 13 = 13
1 x 14 = 14
1 x 15 = 15
1 x 16 = 16
1 x 17 = 17
1 x 18 = 18
1 x 19 = 19
1 x 20 = 20