by this:

This (or this one)

I understand that I look disrespectful, but what if the seller came to the store to buy bread and asked me: do you have a half?)))) andquot;

Hm If the seller came to the store to buy bread, why did she ask you how much bread you need?
And if you came to the store for bread - then why did you not read in the textbook of the Russian language, how to properly use the implicit movements?

And most importantly:
Half of the bread is purchased not because a full bowl is lacking, but so that it does not spoil... (bought half, ate in a day or two, bought bread again).
and your K.O.