If you have no coding experience there is a little bit of work involved in getting it up and running. Something along the lines of the following should work, you'll have to write some of it yourself, but it's for the benefit of humanity so that will be OK I'm sure ;)

#!/usr/bin/perl -T
use strict;
use warnings;
use CGI::Pretty qw/:standard/;
my $result=magicFormula();
print header,     
<<END_HTML;
$result
THIS IS WHERE YOUR INITIAL PAGE GOES WITHOUT THE HEAD SECTION
...
END_HTML

sub magicFormula{
   my $_value1=param('value1');
   my $value=($_value=~/^\d+(?:.\d+)?/); # make sure our input is nume
+ric
   # repeat for all values you expect from form in the page above
   my $result=...# PERFORM MAGIC ON INPUT VALUES
   return "<p> The result of running the magic formula on $value1...$v
+aluen is $result</p>
<p>Re-enter the values below to check another </p>" if $result;
}
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