Worked examples
- MM + XII = MMXII (2000 + 12 = 2012)
- X × X = C (10 × 10 = 100)
- XL ÷ V = VIII (40 ÷ 5 = 8)
- L − X = XL (50 − 10 = 40)
FAQ
What if the result is bigger than 3999 or less than 1?
The classic Roman numeral set can't represent it without overlines. The calculator still shows the integer result, but the Roman field reads "—".
Does division round?
Yes — Roman numerals only represent integers, so division is integer division (truncation toward zero). 25 ÷ 4 = 6, not 6.25.