Logical riddles • Solution for ›A calculation‹


  1 4 2 8 5 • 6 2 5 5
  -------------------
      8 5 7 1 0
        2 8 5 7 0
          7 1 4 2 5
            7 1 4 2 5
  -------------------
      8 9 3 5 2 6 7 5 

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