Doesn't help when I _do_ want three of something though...
Jedan prozor, jedna jabuka Dva prozora, dvije jabuke
Another unrelated quirk in Croatian (and I don't which other related language) is that with numbers 2, 3, 4 you use the genitive singular and with higher numbers the genitive plural
Tri prozora, tri jabuke, tri kune Četri prozora, četri jabuka, četri kune Pet prozora, pet jabuka, pet kuna (notice the -a ending)
I learned that when I wrote some software that converted numeric values in textual form. I never noticed the rule despite speaking correctly (born in a croatian family but I didn't attend school there so I only picked up the language by listening family members, reading tv subtitles and books).
I wonder if an average Croatian is aware of that plural forming rule or they just do the right thing without noticing.
Probably a remnant of the dual case of Proto Indo European