The area of the plot of grass is 128 square meters.
The figure is made up of two rectangles. The first rectangle has a base of 10 meters and a height of 12 meters, so its area is 10 × 12 = 120 square meters.
The second rectangle has a base of 16 meters and a height of 8 meters, so its area is 16 × 8 = 128 square meters.
Since the two rectangles don't overlap, the total area of the plot is 120 + 128 = 248 square meters.