There are 240 books in the school, which are placed on 4 bookshelves on average, and each shelf has 6 floors. How many books are placed on each floor?
学校有240本图书，平均放在4个书架上，每个书架有6层，每层放多少本书？
<gadget id="calculator">240 / 4 / 6</gadget>
<output>10</output>

<result>10</result>