MHB Help with periodic Table question, express the area in square meters

ilovewatermelon
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HInt: The long way from miles to kilometers...

$1\;mile\cdot\dfrac{5280\;ft}{1\;mile}\cdot\dfrac{12\;in}{1\;ft}\cdot\dfrac{2.54\;cm}{1\;in}\cdot\dfrac{1\;m}{100\;cm}\cdot\dfrac{1\;km}{1000\;m}$

Why is your problem any more difficult than this one?

Anyway, you seem to have forgotten that it was SQUARED and you didn't find the right factor.

$1\;\mu m = 10^{-6}\;m$

It's also possible the system is wondering where your units are hiding. $m^{2}$?
 
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I accidentally posted the wrong picture to go with it. Gonna post another picture
 

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ilovewatermelon said:
I accidentally posted the wrong picture to go with it. Gonna post another picture

We can find the periodic table for instance here: https://www.ptable.com
Which numbers are listed for $\ce{Cr}$?
 

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