82690
     +---------
8807 | 89786146
      -8807
       ====
        5856
       -2577
        ====
         7031
        -6650
         ====
          3064
         -9330
          ====
           0696
          -0079
           ====
            861

base: 10
letters: 0123456789
difficulty: intermediate
restrictions: no multiplication