Dr. Skelly informed me you were having problems with run times at the FES computer labs. With the help of some of your classmates, I investigated and have the following suggestions:
Solution: Use the machines in the right-hand room, which have 130 Mbytes memory and probably a faster CPU as well.
Palliative: If stuck with a low memory machine, try using Internet Explorer instead. It's only a few Mbytes smaller in memory, but ran 2x faster on my test case. It certainly took less than 15 minutes to run half-hectare to year 2500.
On a WinNT machine, you check "Physical Memory" by doing CTRL/ALT/Delete (like to logoff) and click on Task Manager, then the tab for Performance. The biggest number in the "Physical Memory" area is the installed RAM.
Palliative: If run times are prohibitive, scale the problem down by using a 4x4 instead of 2x2 array compared to the 6x6 array. Note your excuse and blame Ginger on your homework. :)