Theory:

The International number system is another method for representing numbers.
 
In 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 tables:
Periods on Ones:
Place valueHundredsTensOnes
Number\(100\)\(10\)\(1\)
Number of zeros\(2\)\(1\)\(0\)
Periods on Thousands:
Place valueHundred ThousandsTen ThousandsThousands
Number\(100000\)\(10000\)\(1000\)
Number of zeros\(5\)\(4\)\(3\)
Periods on Millions:
Place valueHundred MillionTen MillionMillion
Number\(100000000\)\(100000000\)\(1000000\)
Number of zeros\(8\)\(7\)\(6\)
Periods on Billions:
Place valueHundred BillionTen BillionBillion
Number\(100000000000\)\(10000000000\)\(1000000000\)
Number of zeros\(11\)\(10\)\(9\)
Periods on Trillions:
Place valueHundred TrillionTen TrillionTrillion
Number\(100000000000000\)\(10000000000000\)\(1000000000000\)
Number of zeros\(14\)\(13\)\(12\)