banan3'14

@DavidRicherby, thanks. I made a summary of all answers and removed erroneous "quarter" from the answer.

@Bilkokuya, your answer still lacks information about definite articles, like @arp wrote

or a quarter liter of water?

Btw, can't I omit "of a" and say for example I need a half liter of water?

Now one of the examples - <quote>You need half a kilogram of potatoes.</quote> doesn't match the pattern - <quote>You need (one/a) quarter of (one/a) liter of water.</qoute>