Oh yes! My mistake. It's been a very very long time since I last used it, and I guess the ordering made me think of the area formula. But I am very embarrassed with myself. Please excuse me while I cry in a corner
You shouldn't be embarrassed by that. If you haven't used it in a long time, there's not really any reason to know it. It's not like finding the circumference of a circle is something that the average person needs to know how to do.
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