22. In $\triangle A B C$, $A D \perp B C$ at $D$, points $E, F, G$ are the midpoints of $A B, B D, A C$ respectively. If $E G=\frac{3}{2} E F, A D+E F=12 \mathrm{~cm}$, then the area of $\triangle A B C$ is $\qquad$ $\mathrm{cm}^{2}$.
Answer: 48