The mole started to dig a new tunnel. First, the tunnel led 5 meters north, then $23 \mathrm{dm}$ west, $150 \mathrm{~cm}$ south, $37 \mathrm{dm}$ west, $620 \mathrm{~cm}$ south, $53 \mathrm{~cm}$ east, and $27 \mathrm{dm}$ north. How many centimeters does he still need to dig to get back to the start of the tunnel?

(M. Dillingerová)
After converting all data to centimeters, we can draw the mole's tunnel. The mole started digging the tunnel at point $S$ and ended at point $K$ (using the usual orientation of cardinal directions).

![](https://cdn.mathpix.com/cropped/2024_04_17_6e39d21eb867b280d8eag-1.jpg?height=711&width=634&top_left_y=1543&top_left_x=745)

The task is to determine the length of the dashed line. In the "west-east" direction, the mole moved from point $S$ by $230+370-53=547 \mathrm{~cm}$ to the west. In the "north-south" direction, the mole moved from point $S$ by $500-150-620+270=0 \mathrm{~cm}$ to the north.

The mole is $547 \mathrm{~cm}$ away from the starting point.