Currency in Saint-Martin (French part) to euro (EUR €). For 10 US dollars you can get 9.27 euros. For 100 US dollars you can get 92.7 euros. And the other way: For 10 euros you can get 11.2 US dollars.
And if you plan a trip to a given region of the world, maybe cheaper than in Saint-Martin (French part) will be in nearby countries? See prices in: Anguilla, Saint Barthélemy, Saint Kitts and Nevis, Antigua and Barbuda, and British Virgin Islands.