一切經音義 1.268

1.268

那庾多（亦西方梵語數法名也依俱舍十十變名以此人間小數挍之數當一溝若以曆算中數萬萬變名那庾多當此國之千億也）。

那庾多 (Also the Sanskrit name for a numerical unit from the Western regions. According to the Kośa, where numbers increase tenfold at each step, if calculated according to the lesser numerical scale of this country, it corresponds to one gōu; if calculated according to the medium numerical scale of astronomical mathematics where numbers increase by myriad-myriads [hundred millions], a nayuta corresponds to one thousand billion [100,000,000,000] in this country).