A bucket of water with buckets weighs 9.3 kilograms, and after pouring half of it, the buckets still weigh 5.6 kilograms. How many kilograms does the barrel weigh?
一桶水连桶共重9.3千克，倒去一半后，连桶还重5.6千克．桶重多少千克？
<result>1.8</result>