D and E are points on the sides AB and AC, respectively of $$\triangle ABC$$ such that DE is parallel to BC and AD : DB - 7 : 9. If CD and BE intersect each other at F. then find the ratio of areas of $$\triangle DEF$$ and $$\triangle CBF$$.

A

49 : 144

B

49 : 81

C

49 : 256

D

256 : 49