I see what you're saying here, doing multiplication backwards to get division, but remember: There are many exceptions to rules in math. for example, It is safe to say any even number is not prime. except for 2, the one and only exception to the rule. See what I mean? Also, you said that you put zero cookies in the first group, but at that point you had allready gone too far. you weren't supposed to make one, two, three, or more groups, just 0.