0.8\times5=4
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Recent Referers:
  1. http://formula.s21g.com/?0.8%5Ctimes5%3D4%0A
  2. https://quartet2003.hatenablog.com/
  3. https://quartet2003.hatenablog.com/archive/2017/05/17
  4. https://quartet2003.hatenablog.com/entry/2017/07/12/211053
  5. https://formula.s21g.com/?0.8%5Ctimes5%3D4%0A.png