The Roman numeral MCDXXX corresponds to the Arabic number 1430.
MCDXXX = 1430
Symbols are written and read from left to right, from highest to lowest.
If number MCDXXX is within to text or sentence it should be read in its equivalent in Arabic numbers, in this case 1430.
MCDXXIX is number 1429
MCDXXXI is number 1431
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