This is cultural. In Polish there's separate word for n-hundred. 200 is dwieście, 300 is trzysta, etc. So nobody thinks about number of hundreds and tousands as

This is cultural. In Polish there's separate word for n-hundred. 200 is dwieście, 300 is trzysta, etc. So nobody thinks about number of hundreds and tousands as connected thing, we just divide the number differently because of language. Imagine someone told you "twelve tens" for 120 :) Anyway, "tysiąc dwieście" for 1200 is easier than "twelve hundred" or "dwanaście setek".