Like many other languages, klingon knows numbers
going from 0-9, i.e. it uses a decimal system. In older times a ternary system (i.e. base 3) was used, but after prolonged contact with other cultures the more widely used decimal system was adopted
There are special words for powers of ten, which are not used alone, however, but only in combination with other numbers 1-9.
For some unknown reason there are two words for 1000, both are used equally
The word vI'
(decimal mark) is used when spelling out decimal numbers. In much of the English-speaking world this is written as a period (.) while the rest of the world uses a comma (,). We do not know how this is written in native Klingon script.
There is another word used for seperating coordinates, usually translated as "mark", DoD
. It was used in Star Trek 5
He pagh pagh pagh DoD cha' yInab
Set a course to zero zero zero mark two
|| cha'maH wej
| 500 401
|| vaghbIp loSvatlh wa'
|| wej vI' wa' loS wa' vagh Hut