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  1. Float.class_eval do
  2.   alias_method :original_round, :round
  3.   def round(decs = 0)
  4.     if decs == 0
  5.       self.original_round
  6.     elsif decs > 0
  7.       decs = decs.to_i
  8.       (self * 10 ** decs).original_round.to_f / 10 ** decs
  9.     else
  10.       raise ArgumentError, "You can't pass negative arguments"
  11.     end
  12.   end
  13. end
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