7DF2
      +---------
1D602 | 21A23B04
       -1D602
        =====
        7E475B
       -7525C2
        ======
         7FDFE0
        -7DC89E
         ======
           3B534
          -FAEC9
           =====
           76884

base: 16
letters: 0123456789ABCDEF
difficulty: medium