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I have something like, say, 3.9 x 10^-22 and I want it to be divided by 1. This is common in Chemistry science questions, but I fail to get the thing. How can we divide 1 by 3.9 x 10^-22 and get a proper answer? I mean, I get confused. Thank you for any help.

Mission Coding
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    You don't want $3.9 \times 10^{-22}$ divided by $1$, you want $1$ divided by $3.9 \times 10^{-22}$, I think. – M. Vinay Jun 09 '14 at 07:54

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$\dfrac{1}{3.9\times 10^{-22}} = \dfrac{1}{3.9}\times \dfrac{1}{10^{-22}} \approx 0.256\times 10^{22} = 2.56\times 10^{21}$, if you want the answer to be in scientific notation.

DeepSea
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