this is my problem... and i cannot even think where to begin. isnt there not enough information given??

In the figure below,ADis the perpendicular bisector ofBC,AE= 9, andDE= 3.

What is the ratio of the area of triangleABCto the area of triangleBCE?

(Hint: Area of triangleABC= 1/2 (AD)(BC) and Area of triangleBCE= 1/2 (DE)(BC)