Answer
$T=144$ square meters
Work Step by Step
The area of this figure can be calculated by taking the area of the large rectangle, substracting the area of the little rectangle.
The area of a rectangle can be calculated by:
$T=a\times b$ where a and b are the lengths of the perpendicular sides.
Here, the large rectangle:
$T_1=12\times 13=156$ square meters
The little rectangle:
$T_2=3\times4 = 12$ square meters.
The area of the figure:
$T=T_1-T_2=156-12=144$ square meters