||\Pi||\to 0
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Recent Referers:
  1. http://formula.s21g.com/?%7C%7C%5CPi%7C%7C%5Cto%200
  2. https://mkprob.hatenablog.com/entry/20120618/1339946741
  3. http://formula.s21g.com/
  4. http://mkprob.hatenablog.com/category/%E7%A2%BA%E7%8E%87?...
  5. http://mkprob.hatenablog.com/?page=1340878551