Translation for 18:25

وَلَبِثُواْ فِي كَهۡفِهِمۡ ثَلَٰثَ مِاْئَةٖ سِنِينَ وَٱزۡدَادُواْ تِسۡعٗا ٢٥
They had remained in their cave for three hundred years, adding nine.1

Foot notes

76896

 Three hundred years in the Gregorian calendar equal three hundred and nine years in the Islamic lunar calendar.