Use $\displaystyle{r}={3}\usepackage{cmbright}\Huge\$ in the formula $\displaystyle{A}=\pi{{r}}^{{2}}\usepackage{cmbright}\Huge\$ to find the area:

$\displaystyle{A}=\pi{{\left({3}\right)}}^{{2}}\usepackage{cmbright}\Huge\$

$\displaystyle{A}=\pi\cdot{9}\usepackage{cmbright}\Huge\$

$\displaystyle{A}\approx{3.14}\cdot{9}={28.26}\usepackage{cmbright}\Huge\$

Rounded to the nearest square meter, the area of the clock face is 28 square meters.