TIL that in India long numbers are separated by a comma after the first three and every TWO digits thereafter: so “10 million” would be written as 1,00,00,000 (“1 karoṛ”).
This link was originally posted to /r/todayilearned. See more things from Dan's Reddit account.
The original link was: https://en.wikipedia.org/wiki/Indian_numbering_system