[lloeki]

> "halvtredsindstyve," meaning "half-third-times-twenty" or (2.5 × 20).

And you even took a shortcut there, AIUI it's "three-minus-a-half" (and that many "twenty", vigesimal as you said) for the "2.5", kinda like roman numeral `IX` is nine ("ten minus one" because the `I` is before the `X`) so it's really an oddball mix of multiple ways to count.

(Source: my wife had a go with learning Danish as well, and we spent a little time going down that rabbit hole. I didn't even try, I'm sticking to easy things like Japanese)