What to do with 75 pounds of oranges?

In a word: Marmalade. Evil Mad Scientist Labs cooks up a batch, and gives tips on scaling the recipe. The real gem is their parting line, "You may recognize our technique as one common in mathematics. We have reduced a difficult problem (what to do with 75 pounds of citrus) into a problem whose solution is well known: what to do with many jars of marmalade. QED."

Reminds me of Cooking for Engineers, and Cooking with Engineers.