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400 million can be re-written: 400,000,000 -- it has 8 zeros

500 has 2 zeros

4 (from 400 million) times 5 (from 500) = 20 -- has 1 zero

Add the zeros: 8 + 2 + 1 = 11 zeros

Answer: 200,000,000,000 = 200 billion or 2 X 10 to the 11th power

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Q: What is 400 million times 500?
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