Sometimes it is advantageous to express a value in round numbers. To round to a particular place, look at the digit immediately to the right of the one you want to round to, in this case, the hundred millions place. If that digit is 4, 3, 2, 1 or 0, zero it and everything to the right of it out. If that digit is 5, 6, 7, 8 or 9, increase your target digit by one and zero everything to the right of it out. If your target digit is 9, it will become a zero and increase the digit to the left of it by one.
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2,942,628,241 rounded to the nearest billions place is 3 billion (3,000,000,000).
The place value after millions is billions.
the highest place value is billions place.
In the US system, the next place to the left has a value of one billion to under ten billion, or units of billions. Then there is tens of billions, and hundreds of billions.
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