三一三十一 [－－－－－]

Jyutping saam1 jat1 saam1 sap6 jat1
Pinyin sān yī sān shí yī

Definitions (Wiktionary)
  1. phrase, idiomatic
    one divided by three is zero point three, leaving a one to the next digit; 1/3=0.3……0.1
  2. phrase, figuratively, idiomatic
    to divide fairly between 3 people