I can't even come close to doing that, and I took two years of Latin in high school.
BTW, what's the square root of XIX?
If the Romans defined numbers smaller than "I" (One), which they didn't, and therefore understood the decimal point in a non-duodecimal base10 numeric system, which they didn't, we can express the square root of the Roman number 29 in the following anachronistic way:
V.MMMDCCCLI