9-1. Segment $P Q$ is divided into several smaller segments. On each of them, a square is constructed (see figure).

![](https://cdn.mathpix.com/cropped/2024_05_06_535cfcd84333341737d0g-20.jpg?height=619&width=1194&top_left_y=593&top_left_x=431)

What is the length of the path along the arrows if the length of segment $P Q$ is 73? If necessary, round the answer to 0.01 or write the answer as a common fraction.
Answer: 219.

Solution. Note that in each square, instead of going along one side, we go along three sides. Therefore, the length of the path along the arrows is 3 times the length of the path along the segment, hence the answer $73 \cdot 3=219$.