19929
      +----------
08466 | 328910910
       -08466
        =====
        082230
       -630294
        ======
         059349
        -630294
         ======
          828381
         -816772
          ======
           691270
          -630294
           ======
             7974

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