bedlamite offered:
"They are easier than Romulan numerals" with a link to:
http://www.languagesandnumbers.com/how-to-count-in-romulan/en/romulan/•Digits from zero to nine are specific words: lliu - , hwi [1], kre [2], sei [3], mne [4], rhi [5], fve [6], lli [7], the [8], and lhi [9].
So I wondered what they did/do/will do about decimal points, and I put these into the translator:
pi: sehu-dha’mne dhei khu-rha’lhi
e: kra’lli dhei khu-thha’kre
ln(pi): dha’hwi sei-dhei mnhu-mnha’lli sei-dhei kru-lha’the kre-dhei thhu-rha’the kre-dhei mnhu-lha’mne kre-dhei hwi dhei llu-mnha’hwi mnhe-dhei mnhu-seha’mne sei-dhei kru-lla’sei kre-dhei rhu-dha’sei dhei rhu-seha’hwi
To save you the trouble, that's 1.1447298858494001741434273513531.
Took a while for the translator to come back with an answer, though. Probably actually means "What the hell are you asking things like that for, you idiot?"
Hm.
So to isolate what they used for a decimal indication, I put .5 in the translater and it returned "rhi," which is just the numeral 5, no indication of a decimal point.
No wonder even the far eastern countries use arabic numerals. At least the Romulans had/have/will have a zero.