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MMMM with an horizontal bar above each numeral to signify multiplication by one thousand. Therefore MMMM = 4000 but with an horizotal bar above each numeral its value changes to 4000000. Brackets can also be used to denote that a numeral is multiplied by 1000 so (MMMM), which denotes 4000 multiplied by 1000 would also equal 4,000,000.

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15y ago

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