This is a program written in Chef, which you can look at here: http://www.dangermouse.net/esoteric/chef.html
This particular Chef program is a recipe for an All Purpose Stew. When ran, it waits for the user to tell it how people they want to serve. After the user enters a number and presses enter, the program tells you what to multiply the values of the ingredients by to serve that many people.
To download the program: click here.
This program was written for this interpreter: click here.
You will need this version of Perl to run it; http://ftp.activestate.com/ActivePerl/Windows/5.6/ActivePerl-5.6.1.638-MSWin32-x86.zip
If you are having trouble, here are some step-by-step instructions:
(1) Download the 5.6.1 distribution of Perl instead of the 5.8, click on the link above
(2) Unzip the Perl installer and run the install.bat file. Say "Y" to all options. I'm assuming you'll install in the default directory c:\perl
(3) Download and unzip the Chef archive from the above link.
(4) Copy the contents of the "lib" folder in that archive into the "lib" folder in c:\perl (or wherever you installed Perl)
(5) Move the chef folder to c:\ (for convenience)
(6) Move the downloaded AllPurposeStew.chef file you downloaded by clicking on the link above into c:\chef\examples\
(7) Open a DOS prompt window and try this: c:\perl\bin\perl.exe c:\chef\chef.pl c:\chef\examples\AllPurposeStew.chef