In the right triangle $△ACE$, we have $AC=10$, $CE=24$, and $EA=26$. Points $B$, $D$, and $F$ are located on $AC$, $CE$, and $EA$, respectively, so that $AB=5$, $CD=12$, and $EF=13$. What is the ratio of the area of $△DBF$ to that of $△ACE$?