ขอทราบวิธีคิดจ้า

1  Buddhism was introduced to Sri Lanka in 236 BE (cir. 250 BCE)

2 Buddhism as a form of religious expression gained ascendency in India during this period. Emperor Asoka was crowned, according to the chronicles, in the year 218 of the Buddhist era (i.e. 268 BCE).

3   from India about 805 BE (311 CE),

4  writing in 397 BE (89 BCE)