You can divide the shape below into two figures: A rectangle and a square.
See the picture below:
The area of the rectangle can be calculated using this formula:
Where "l" is the length and "w" is the width.
In this case:
Then, you can substitute values into the formula and evaluate:
The area of a square can be found with this formula:
Where "s" is the length of any side of the square.
In this case:
Then, the area of this square is:
Now you can set up that the total area of the shape will be:
Then, solving the Addition, you get:
The solution is: