You don't need to learn Perl to do that. There are many other scripting languages and compiled languages that you could choose instead. However, if you want the best online support provided for any language then the place to get that is PerlMonks and the language of choice is obviously Perl.

Besides, once you've learned Perl you can then use it to rule the world, or at least manage all those bothersome little tasks around your computer.

If your formula is non-trivial and original, patent it. If it's a good enough idea otherwise, get a good NDA together and seek investors.

Once you have clear ownership of something secrecy is sort of beside the point and some would even argue it a handicap. I wish someone would steal one of my ideas and make a million dollars because then I could sue them for ten million. (Sidebar: I have had to file DCMA notices a couple of times but I doubt anyone made better than coffee money stealing my work.)

On the Perl front, if you're mathematically/analytically inclined you can write useful Perl code in a week or two with one of the better books to guide you. Perl is one of the hardest languages to master but one of the easiest, if not the easiest, with which to write useful code. You can get plenty of excellent help here if you get stuck on pieces of code.

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;
}
[download]

...as most programmers don't feel comfortable with Perl.

Quite right, quite right. We all know most programmers are much more comfortable with Lisp, Logo, Basic, Pascal, and PHP, I mean Befunge. It's Perl that makes the skin crawl.

...most programmers don't feel comfortable with Perl. - I wondered how the provenance of the VB-alike, Python 'language' could possibly be explained ;-D
A user level that continues to overstate my experience :-))