Message text written by pRob
>For those of us who are twelve year olds: a millimeter is roughly 1/25 of
an inch, so a square millimeter is ~1/600 (1/625th is closer, but makes
the math harder) of an inch. 58,000 is ~60,000.
This leads to 60,000/600, or 100 sq inches: a 10x10 inch opening.
All this without a calculator :)
<
Good for your! It is good to be able to "ball-park" it even if you have a
calculator. That way you can easily detect a slipped decimal point.
Dave (close enough)
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