Ann:my number has two periods. one contains the digits 4,1, and 8 in that order. the other contains the digit 9.

The Decimal number system has following rules.

Suppose you have to write a number 4,567,892.

2 - ones - (first period)

9-tens - (first period)

8-hundreds - (first period)

7-thousands - (second period)

6-ten thousand - (second period)

5-hundred thousand - (second period)

4-million - (third period)

then comes ten million, hundred million and then Billion.

If a number is given you have to apply commas from left to right after every three places.

So, your number is 9,418.

8-first period

1--first period

4--first period

9 - second period