Why does each chunk appear to have 101 elements?

c:\@Work\Perl\monks>perl -wMstrict -le
"use Data::Dumper;
 my @a = (1..1284);
 my $chunkedRef = chunky(@a);
 sub chunky {
      my %master;
      for(0..int @_/100)
      {
          push @{$master{$_+1 . ' key'}},@a[$_*100..$_*100+100];
      }
      return \%master;
 }
 print 'elements per chunk: ', scalar @{ $chunkedRef->{'1 key'} };
"
elements per chunk: 101
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