In this challenge, we’re trying to find the area of a rectangle. The first square has side length 1. It shares a side with another, which must also have side 1. This makes the 2 big squares above them both have side length 2. This makes the square to the right have side length 5 units, and the one below, 7. Then we must do some algebra and find that 4x=12, x=3. This makes the very large square have side length 9, and thus the rectangle is 12 by 16. This gives it an area of 192.