please solve my doubt fast

Dear Student,
Area of the shaded portion = Area of the rectangle with 27 m length and (9 - 3)  m breadth +  Area of the rectangle with (18 - (9 - 3)) m length and 2 m breadth + Area of the rectangle with 3 m length and 2 m breadth
Since, area of a rectangle = length x breadth
Area of the shaded portion = (27 x (9 - 3) + (18 - (9 - 3)) x 2 + 3 x 2) $m^2$
=( 27 x 6 + 12 x 2  + 3 x 2)$m^2$
= 192 $m^2$
The unit should be $m^2$ so, the answer would be option E, none of these.

Regards,