Re: Not sobern and at home, ooops!
1/5 is that 1/5 of one litre?
in that case it is 1/5 * 1/2 of one litre which is 1/10 of one litre which is 5 * 2cl (1l = 100cl). That would make it 5.
You are sure you never had more than (what is corresponding to) 5 beers in one day? If you never drink that much alcohol you might be right.
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