Yes, engaging the conversion formula, \[1\ mg\ \ =\ \ \frac{1}{1000}\times 1\ g\] , “10g” can be converted to corresponding “mg” in the following way.

\begin{aligned}

& 

 1 \text { gram }=1000 \mathrm{mg} \\

& \begin{aligned}

\therefore 10 \mathrm{~g} & =10 \times 1000 \times(1 \mathrm{mg}) \\

& =10 \times 1000 \mathrm{mg} \\

& =10000 \mathrm{mg}

\end{aligned}

\end{aligned}

So, there are “10,000mg” in “10g”.