It is 10000000000 or even 10 billion. A decimal number is simply a way of representing a number in such a way that the place value of each digit is ten times that of the digit to its right. A decimal representation does not require a decimal point.
1.08 billion written as a decimal is 1,080,000,000.0
1.billion
1.04 billion in decimal form is 1,040,000,000
51 billion in decimal or standard form is 51,000,000,000
7,320,000,000.0
200,000,000,000.0
24,000,000
.1000000000
20,000,000,000.00
100,000,000,000.
If that is a decimal point after 2 then it is 2,000,000,000 = 2 billion
7,000,000,000 or 7,000,000,000.0