37.(2022•浙江模拟)在ΔABC\Delta ABCΔABC中,已知AB=5AB=5AB=5,AC=3AC=3AC=3,A=2π3A=\frac{2\pi }{3}A=32π,III为ΔABC\Delta ABCΔABC的内心,CICICI的延长线交ABABAB于点DDD,则ΔABC\Delta ABCΔABC的外接圆的面积为 ___49π3\frac{49\pi }{3}349π___,CD=CD=CD=[ ].