7. As shown in the figure, in triangle $A B C$, $B E=E D=D C$, connect $A D$ and $A E$. Take a point $F$ on $A D$, and connect $C F$ and $B F$. If the areas of triangle $A C F$ and triangle $E F G$ are 28 and 12, respectively, then the area of triangle $A B C$ is $\qquad$
【Match the answer】210