9. As shown in the figure, the area of trapezoid $A B C D$ is 117 square centimeters. $A D / / B C$, $E F=13$ centimeters, $M N=4$ centimeters, and it is also known that $E F \perp M N$ at $O$. What is the total area of the shaded parts? $\qquad$ square centimeters.
65 ,