use HTML::Template;
use CGI;
my $query = new CGI;
my $num1 = $query->param('num1');
my $num2 = $query->param('num2');
my $template = HTML::Template -> new(filename => "addnumbers.tmpl");
$template->param( answer => $num1 + $num2 )
print "Content-type: text/html\n\n";
print $template->output();