You split it into 2 shapes.
So the simplest way to split it up is splitting it into 2 rectangles of 2x3 and 3x7
So then, the are of the whole figure would be 6+ 21 = 27 square units.
The perimeter would be 2+3+3+5+7 = 20 units.
(By the way to find the length of the black side, you add up the number on the opposite side, 2+3 = 5)
