Arithmetics

1/3 = 0.[3]
1/6 = 0.1[6]
1/7 = 0.[142857]
1/9 = 0.[1]
1/17 = 0.[0588235294117647]
1/11 = 0.[09]
1/13 = 0.[076923]
1/15 = 0.0[6]
1/19 = 0.52631578...