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  1. or download this
    #!perl
    use Math::BigFloat;
    ...
                 (new Math::BigFloat("10")**(new Math::BigFloat("17")))));
    # Properly prints "0"
    # (well, something like 7e-17 would be closer, but I'll accept 0)
    
  2. or download this
    #!perl
    use bignum;
    ...
           exp(new Math::BigFloat("-7") /
                 (new Math::BigFloat("10")**(new Math::BigFloat("17")))));
    # Incorrectly prints "1"
    
  3. or download this
    @/=map{[/./g]}qw/.h_nJ Xapou cets krht ele_ r_ra/;
    map{y/X_/\n /;print}map{pop@$_}@/for@/