The flour mill purchased a total of 8,400 kilograms of wheat. If 300 kilograms of wheat are used to process flour every day, will there be any surplus after 28 days of processing?
面粉厂一共收购8400千克小麦，如果每天用300千克小麦加工面粉，加工28天后还有剩余吗？
<result>28</result>