Why am I getting long decimals (eg, 19.9499999999999) instead of the numbers I should be getting (eg, 19.95)?
    Internally, your computer represents floating-point numbers in binary.
    Digital (as in powers of two) computers cannot store all numbers
    exactly. Some real numbers lose precision in the process. This is a
    problem with how computers store numbers and affects all computer
    languages, not just Perl.

    perlnumber show the gory details of number representations and
    conversions.

    To limit the number of decimal places in your numbers, you can use the
    printf or sprintf function. See the "Floating Point Arithmetic" for more
    details.

            printf "%.2f", 10/3;

            my $number = sprintf "%.2f", 10/3;

  Why is int() broken?
    Your int() is most probably working just fine. It's the numbers that
    aren't quite what you think.

    First, see the above item "Why am I getting long decimals (eg,
    19.9499999999999) instead of the numbers I should be getting (eg,
    19.95)?".

    For example, this

        print int(0.6/0.2-2), "\n";

    will in most computers print 0, not 1, because even such simple numbers
    as 0.6 and 0.2 cannot be presented exactly by floating-point numbers.
    What you think in the above as 'three' is really more like
    2.9999999999999995559.