In right angle triangle $∆ABC$ , $AC$ is the hypotenuse. $D$ is the midpoint of $AC$. $E$ is a point on the extension of $BD$. A perpendicular line is drawn from $E$ to $BC$ which intersects $AC$ & $BC$ in $F$ & $G$ respectively.If $\angle ACB=30°$ then Find $\frac{\angle ADB} {\angle CFG}$