My first, empirical answer: physically, dividing a candybar into x parts leaves x parts. Dividing it by 1 OR 0 or -x is not dividing it. You're left with 1 candybar. Infinity? is overthinkig it.
It also depends on how you divide. Dividing the Rosetta Stone into two parts, much information can be lost depending on the orientation of the cut. Say you divide it at a 45° angle from top left to bottom right) might be ok, depending on how much the pieces are separated.
Clearly the simple little word 'divide' is carrying too much weight here. Mathers, feh.
It also depends on how you divide. Dividing the Rosetta Stone into two parts, much information can be lost depending on the orientation of the cut. Say you divide it at a 45° angle from top left to bottom right) might be ok, depending on how much the pieces are separated.
Clearly the simple little word 'divide' is carrying too much weight here. Mathers, feh.