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There are nine zeros in a billion.
how many zeros in one billion
1 billion has 9 zeros.
In 90 billion, there are 9 zeros. This is because a billion has 9 zeros (1,000,000,000), and when you multiply 90 by a billion, you get 90 billion, which retains the 9 zeros from the billion.
There are 8 zeros in 22.5 billion, which is 22,500,000,000