Encyclopedia of India–China Cultural Contacts v1.c6.s1.t3.6

v1.c6.s1.t3.6

What Liuhong mentions is the three kinds of scale system. The bottom in 10 multiply 10, the middle in 10,000 multiply 10,000 and the top in number changed when there is no number. Ten multiply 10 is 100, 10 multiply 100 is 1000 and 10 multiply 1000 is 10,000 and so on. Ten thousand multiply 10,000 means 10,000 multiply 10,000 is a hundred million and then billion, a hundred billion etc. The number changes when there is no number means a hundred million, billion and a hundred billion. This so-called number changes is the same as the point 45 in *Buddhavatamsaka-Mahavaipulya-Sutra* translated by Siksananda in Tang dynasty; the article 25 of *The King of Hearts Bodhisattva Asks the Monk Named A Seng* in book 29 translated by Buddhabhadra in Eastern Jin Dynasty and the *Bodhisattva Arithmetics* in book 10 named *Never Thinking of Liberated World When All of the Elites Doing Good* translated by Tang monk Prajnaparamite Kawmira. If the *Summary of Mathematics* was truly written and noted by Zhen Luan, the way to getting involved in the arithmetics is easy for him.