number left                right
========= ============ ============
     0/7: 0.0000             0.0000
     1/7: 0.1429             0.1429
    11/7: 1.5714             1.5714
   111/7: 15.8571           15.8571
  1111/7: 158.7143         158.7143
-11111/7: -1587.2856     -1587.2856

       0: 0                       0
      10: 10                     10
    1000: 1000                 1000
-1000000: -1000000         -1000000
========= ============ ============