Correct. Substituting $\displaystyle{2}{x}{z}\usepackage{cmbright}\Huge\$ in for l and $\displaystyle{12}{x}{y}{z}\usepackage{cmbright}\Huge\$ in for w, you find that $\displaystyle{A}{r}{e}{a}={2}{x}{z}\cdot{12}{x}{y}{z}\usepackage{cmbright}\Huge\$ , which is $\displaystyle{24}{{x}}^{{2}}{y}{{z}}^{{2}}\usepackage{cmbright}\Huge\$ .