Do the math. If you can fit 3 one inch trays in one 4 inch tray (my reason being that the little floor thing is not taken into account, and 3 of them will pretty much be about half an inch anyways), which will net you the most knights? If you can fit, say, 6 knights into one one inch tray, can a 4 inch tray fit 18 knights? You can also finally do that Linear Programming stuff you learned in High School when you said "When will I ever use this in real life?"
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