my @formatted_nums = 
  (
    '0x000000',
    '0x010000',
    '0x020000',
    '0x030000',
  );

foreach my $num (@formatted_nums)
{
   $num = hex($num); #converts all hex strings to numbers
}

foreach my $num (@formatted_nums)
{
   print "$num\n";  #see now decimal numbers...
}
#  prints:
#     0
#     65536
#     131072
#     196608

foreach $num (@formatted_nums)
{
   printf "%X\n", ++$num; #print hex value of the number +1
}
#prints:
1
10001
20001
30001