一切經音義 27.526

27.526

億載（則代反笇經黃帝為數法有十等謂億兆京姟壤秭溝澗正載及其用也有三謂上中下下數十萬曰億中數百萬曰億上數萬萬曰億）。

億載 (Fanqie ze-dai [zǎi]. The Mathematical Classic of the Yellow Emperor states that numerical calculation has ten tiers: yi, zhao, jing, gai, rang, zi, gou, jian, zheng, zai. When applied, there are three systems: upper, middle, and lower. In the lower system, ten myriad is an yi; in the middle system, one hundred myriad is an yi; in the upper system, myriad myriad is an yi).