<prompt> Translate the following text to EnglishMwaka 1877 Ufaransa ilinunua kisiwa hicho kutoka Sweden kwa sarafu ya dhahabu ya francs 320,000 Louis XVI alikuwa amempa rafiki yake Mfalme Gustav III kisiwa hicho miaka 93 mapema kwa kubadilishana haki za biashara ya bure huko Gothenburg.  <response>: In 1877, France bought back Saint-Barth??lemy from Sweden for 320,000 gold francs Louis XVI having ceded the little island 93 years earlier to his friend King Gustav III in return for duty-free trading rights in Gothenburg. 