56487
       +-----------
142638 | 8950810621
        -142638
         ======
         1028230
        -1573413
         =======
          1625746
         -1058621
          =======
           7619402
          -7813234
           =======
             466651
            -865819
             ======
             728284

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