399.200.000.
=499000x800
=399200000
100 đấy câu đố mẹo
456x10000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000=bao nhiêu tớ sắp bị cô mắng rồi huhuhuhu