CDLXXXX

CDLXXXX is a Roman numeral representing the number 490. In the Roman numeral system, 'C' represents 100, 'D' represents 500, and 'X' represents 10. When a smaller numeral precedes a larger numeral, it is subtracted. Therefore, 'CD' signifies 400 (500 - 100), and 'LXXXX' signifies 90 (50 + 10 + 10 + 10 + 10, or more commonly, L = 50 and XXXX = 40, resulting in 90). Combining these, CDLXXXX equals 400 + 90, which equals 490. It is worth noting that the representation of 90 as LXXXX is less common than XC (100 - 10). The standard representation for 490 would typically be CDXC. However, CDLXXXX remains a valid, albeit less frequent, method of writing the number 490 in Roman numerals. The system relies on additive and subtractive principles to denote numerical values.