0258
      +---------
45342 | 80601954
       -7767A
        =====
        4A2A09
       -4802A4
        ======
         46A605
        -477A63
         ======
          43AA84
         -445939
          ======
            299A

base: 11
letters: 0123456789A
difficulty: intermediate
restrictions: no multiplication