The area of given figure is
42 sq. units
Figure given in the question can be divided into rectangles as shown below:
Area of a rectangle = length x breadth
Required area = Area of rectangle AHIB + Area of rectangle GFJI + Area of rectangle EDCJ
∴ Required area = (3 × 6) + (4 × 3) + (2 × 6)
= 18 + 12 + 12
= 42 sq. units