CDXVIII

CDXVIII is the Roman numeral representation of the number 418. In Roman numeral notation, C represents 100, D represents 500, X represents 10, and V represents 5, and I represents 1. The numeral is constructed by combining these symbols according to specific rules. The arrangement CDXVIII follows the additive principle, where symbols of lesser value are placed after symbols of greater value. Therefore, CDXVIII breaks down as follows: C (100) + D (500) is incorrect. Instead, the subtractive principle is applied for CD, where C (100) before D (500) signifies 500 - 100 = 400. Following this, X (10) + V (5) + I (1) + I (1) equals 17. Combining these parts, CDXVIII equals 400 + 10 + 5 + 1 + 1 = 418. This number is an integer. Roman numerals are an ancient numeral system that originated in Rome and was used throughout the Roman Empire. While no longer in widespread use for everyday calculations, Roman numerals are still found in various contexts, such as clock faces, numbering chapters in books, and designating regnal years.