whats the answer

Hello Alan!

If brackets were set, it would look like this.
Without brackets 10 * 23 is not in the denominator.
10 ^ 23 is nowhere.
Thanks anyway! asinus :- ) 

2.72*10^22/6.02*10*23

$\frac {2.72\times 10^{22}}{6.02} \times 10\times 23={\color{blue}1.03920265781\times 10^{24}}$ 

  !

I suspect this is meant to be $\frac{2.72\times10^{22}}{6.02\times10^{23}}\rightarrow \frac{2.72\times10^{-1}}{6.02}\rightarrow0.4518...\times10^{-1}\rightarrow 0.04518...$

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