at sixes and sevens 七上八下

at sixes and sevens means
(1) confused or undecided : eg. I’m at sixes and sevens about what to do.(2) in disorder: eg. Your room is all at sixes and sevens.
這個用法和中文很好玩的是，都是用數字表示。翻譯成中文是七上八下，亂七八糟。英文卻是用6和7來表示。