请帮忙翻译:Inthegameofbaseball,aplayer'sbattingaverageisobtainedbydividingthe
numberofhitsbythenumberoftimesatbat.Aplayerhasalreadyhad100hitsin400timesatbat.Ifhestillhas200moretimesatbatuntiltheendoftheseason,howmanymorehitsdoesheneedinordertoendtheseasonwithabattingaverageof0.300?