关于本计算器
Convert 1–3999 to Roman numerals and validate/parse numerals back.
数字与罗马数字互转。
Convert 1–3999 to Roman numerals and validate/parse numerals back.
IV=4, IX=9, XL=40, XC=90, CD=400, CM=900.
Classical form stops at MMMCMXCIX — larger needs overlines.
Malformed strings like IIII are rejected, not guessed.