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In Roman numerals, M = 1000, D = 500, C = 100, L = 50, X = 10, V = 5, and I = 1. A single Roman numeral of lesser value placed before a Roman numeral of higher value means to subtract the lesser one, so CM = 900, CD = 400, XC = 90, XL = 40, IX = 9, and IV = 4, but the lesser one should be no more than one power of 10 less, meaning you do not write IC to mean 99.

So, 300 is CCC, 40 is XL, and 7 is VII, so combine them to get 347 = CCCXLVII.

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16y ago

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