4.414x10^-21 / 1.60x10^-19

$${\mathtt{4.414}}{\mathtt{\,\times\,}}{{\mathtt{10}}}^{{\mathtt{\,-\,}}\left({\frac{{\mathtt{21}}}{{\mathtt{1.6}}}}{\mathtt{\,\times\,}}{{\mathtt{10}}}^{-{\mathtt{19}}}\right)} = {\frac{{\mathtt{2\,207}}}{{\mathtt{500}}}} = {\mathtt{4.414}}$$

.

I think that the intended question is 

 

(4.414x10^(-21)) / (1.60x10^(-19))

 

$${\frac{\left({\mathtt{4.414}}{\mathtt{\,\times\,}}{{\mathtt{10}}}^{\left(-{\mathtt{21}}\right)}\right)}{\left({\mathtt{1.6}}{\mathtt{\,\times\,}}{{\mathtt{10}}}^{\left(-{\mathtt{19}}\right)}\right)}} = {\mathtt{0.027\: \!587\: \!5}}$$