[draegtun]

perl6 also use rationals (by default)...

  $ perl6

  > 0.1 + 0.2 == 0.3
  True

  > (0.1 + 0.2).perl
  3/10

For perl5 you must use the bigrat pragma:

  $ re.pl

  > 0.1 + 0.2 != 0.3
  1

  > use bigrat;
  > 0.1 + 0.2 == 0.3
  1

ref: http://perldoc.perl.org/bigrat.html