AMO 2027 Grades 8-9 SET 11 - Self-study Question 9

The diagram below shows square $ABCD$ such that
$$AE=EF=FB=BG=GH=HC=CI=IJ=JD=DK=KL=LA=20\mathrm{cm}.$$
Find the area of the square $MNPQ$ in $\mathrm{cm}^2$.