C:\> test.pl
Argument "0x2" isn't numeric in addition (+) at C:\test.pl line 9.
Argument "0x28" isn't numeric in addition (+) at C:\test.pl line 9.
0 0

##</code><code>##

my $this = sprintf("0x%x", 40);
my $that = sprintf("0x%x", 2);

my $other = eval "$this + $that";

printf "$other %x\n", $other;