const n = 9217583.9326;
console.log("Locale String: " + n.toLocaleString());
console.log("German: " + n.toLocaleString('de-DE'));
console.log("Arabic: " + n.toLocaleString('ar-EG'));
console.log("Swedish: " + n.toLocaleString('sv-SE'));
console.log("Mainland China: " + n.toLocaleString('zh-CN'));
/*
run:
"Locale String: 9,217,583.933"
"German: 9.217.583,933"
"Arabic: ٩٬٢١٧٬٥٨٣٫٩٣٣"
"Swedish: 9 217 583,933"
"Mainland China: 9,217,583.933"
*/