續一切經音義 2.118

2.118

百洛叉為一俱胝（洛叉俱胝皆梵語數法名也。或十萬為一洛叉。百萬為一洛叉或萬萬為一洛叉。依此方孫子算經云十十為百。十百為千。十千為萬。自萬至億有三等上中下數變之也。依黃帝算經總有二十三數謂一二三四五六七八九十百千萬億兆京姟秭壤溝澗正載也。亦從萬已去有三等數謂其下者十十變之。中者百百變之。上者億億變之。慧菀法師云經言俱胝當此億也。阿庾多兆也。那由他京也。餘准例知。自億已去皆以能數量為一數。復數至本名數量乃至不可說轉是）。

A hundred lakṣas make one koṭi (百洛叉為一俱胝: Lakṣa and koṭi are both Sanskrit numerical terms. Sometimes one hundred thousand makes one lakṣa, or one million makes one lakṣa, or one hundred million makes one lakṣa. According to the Master Sun's Computational Classic of this land: ten tens make a hundred; ten hundreds make a thousand; ten thousands make a myriad (wàn). From myriad to myriad-myriad (yì), there are three grades of transformation: upper, middle, and lower. According to the Yellow Emperor's Computational Classic, there are twenty-three numbers in total: one, two, three, four, five, six, seven, eight, nine, ten, hundred, thousand, myriad (wàn), yì, zhào, jīng, gāi, zǐ, rǎng, gōu, jiàn, zhèng, and zài. From myriad onward, there are also three grades of counting: the lower grade increments tenfold, the middle grade increments hundredfold, and the upper grade increments yì-fold. Master Huiyuan states that the sūtra’s ‘koṭi’ corresponds to yì here, ‘ayuta’ to zhào, and ‘nayuta’ to jīng; the rest can be known by extension. From yì onward, each previous counting quantity is taken as one unit to count up to the next named quantity, all the way up to the ineffable-ineffable).