Maria is sailing her ship back to her home island but wants to stop at a neighboring island along the way. Looking at her map (shown below), Maria knows her current location and the locations of both islands.
**How much shorter would it be for Maria to go straight home instead of making the additional stop?**
[[☃ math-keypad 1]] $\text{km}$
Round your *final answer* to the nearest tenth of a kilometer. Do not round intermediate calculations.

*Coordinate values are in kilometers.*