There are 3 bookcases in the school reading room, and each bookcase has 3 floors. If 801 books are to be placed in the 3 bookcases, how many books are placed on each floor on average?
学校阅览室有3个书柜，每个书柜有3层，要把801本书放到3个书柜中，平均每层放多少本？
<gadget id="calculator">801 / 3 / 3</gadget>
<output>89</output>

<result>89</result>