Three parallel lines L_1, L_2, L_3 are drawn in the plane such that...

Three parallel lines $L_1, L_2, L_3$ are drawn in the plane such that the perpendicular distance between $L_1$ and $L_2$ is 3 and the perpendicular distance between $L_2$ and $L_3$ is also 3 . A square $A B C D$ is constructed such that $A$ lies on $L_1, B$ lies on $L_3$ and $C$ lies on $L_2$.Find the area of the square