Gold can be hammered into decorative gold leaf, which is only $1\mathrm{.}00$E$-07$ m thick. If $1\mathrm{.}60$ troy ounce of gold is hammered into gold leaf, what is the area that can be covered when used for decoration? $1$ troy ounce $=31\mathrm{.}1$ g$,$ and the density of gold is $19\mathrm{.}3$ g$/$cm$3.$

Enter the value with the appropriate number of significant figures. $$

m$2$

$2.$ The Greek mathematician Archimedes is credited with discovering how to verify the amount of pure gold in a