Quadrilaterals & Polygons · Medium problem

Square $ABCD$ has vertices $A(0,0)$, $B(8,0)$, $C(8,8)$, $D(0,8)$. Let $E$ be the midpoint of $\overline{AB}$ and $F$ the midpoint of $\overline{BC}$. Find the area of $\triangle DEF$.