### Theory:

The International number system is another method for representing numbers.

In the International numbering system, to read the numbers easily different periods are formed. The periods used here are ones, thousand and millions etc.

The place values in the International system of numeration are Ones, Tens, Hundreds, Thousands, Ten Thousands, Hundred Thousands, Millions, Ten millions, and so on.
Example:
Consider the number $$618,509,372$$ the place values of each digit are:

$$2$$ – Ones
$$7$$ – Tens
$$3$$ – Hundreds
$$9$$ – Thousands
$$0$$ – Ten Thousands
$$5$$ – Hundred Thousands
$$8$$ – Millions
$$1$$ – Ten millions
$$6$$ – Hundred millions
Let us go through the International numeral system place value table:
Periods on Ones:
 Place value Hundreds Tens Ones Number $$100$$ $$10$$ $$1$$ Number of zeros $$2$$ $$1$$ $$0$$
Periods on Thousands:
 Place value Hundred Thousands Ten Thousands Thousands Number $$100000$$ $$10000$$ $$1000$$ Number of zeros $$5$$ $$4$$ $$3$$
Periods on Millions:
 Place value Hundred Million Ten Million Million Number $$100000000$$ $$100000000$$ $$1000000$$ Number of zeros $$8$$ $$7$$ $$6$$
Periods on Billions:
 Place value Hundred Billion Ten Billion Billion Number $$100000000000$$ $$10000000000$$ $$1000000000$$ Number of zeros $$11$$ $$10$$ $$9$$
Periods on Trillions:
 Place value Hundred Trillion Ten Trillion Trillion Number $$100000000000000$$ $$10000000000000$$ $$1000000000000$$ Number of zeros $$14$$ $$13$$ $$12$$