CCCXLV

CCCXLV is a Roman numeral. It represents the number 345 in the modern Arabic numeral system. To understand its value, we can break down the Roman numeral system. C represents 100, X represents 10, and V represents 5. When Roman numerals are arranged from largest to smallest, their values are added together. In CCCXLV, we have three Cs, so that's 100 + 100 + 100 = 300. Next, we have XL. Here, the X (10) comes before the L (50). This indicates subtraction, meaning 50 - 10 = 40. Finally, we have V, which is 5. Adding these components together: 300 + 40 + 5 equals 345. Therefore, CCCXLV is the Roman numeral representation of the number three hundred and forty-five.