I copied your code and ran it against the data you provided and it works the way you would expect on my computer. I'm not sure what's going on here, but here's the code (I added newlines to your print statements): 

#!/usr/bin/perl
use strict;
use warnings;

my $file = "sizes";

open(my $fh, '<', $file) or die "Could not open '$file' $!\n";

while (my $line = <$fh>)
{
    chomp $line;
    my ($drive, $sizegb, $freegb) = split (/,/,$line);

    print qq($sizegb\n);
    $sizegb /= 1024;
    print qq($sizegb\n);
}

[download]

For the data in file "sizes", I used what you provided, minus the headers. Here's the output:

95342874624
93108276
2119757824
2070076
3295703040
3218460

[download]
--Nick

In reply to Re: Arrays and division not working... by nlwhittle
in thread Arrays and division not working... by Vishza

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.