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The Roman Number for 400,000,000 utilizes parentheses. Parentheses in Roman Numerals represent multiplication of the numeral inside by 1000. So 4,000 is (IV) or 4 x 1000. In traditional writing you'd place a line over the top of the number in parentheses which denotes the same as the paraentheses.

So knowing this, we'd find out that the Roman Number for 400,000,000 would be ((CD)) or (500 - 100) x 1000 x 1000.

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11y ago

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