Excel include the Function (In spanish, I don't know the version in English) NUMERO.RUMANO. It converts numbers into roman numerals.
Steps to Reproduce:
1. Write hte función.
2. Insert or select the arguments.
3. Obtaint convertion.
The function does not exist
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Created attachment 150027 [details]
In calc 6.2 only suggests NUMERO.ARABE
Created attachment 150028 [details]
It has 4 conversion formats
Created attachment 150029 [details]
4 different results, one for each argument
there is function ROMAN
works for me