A bookshelf has 4 floors. If 460 books are placed on these 5 bookshelves on average, how many books should be placed on each floor?
一个书架共有4层，如果把460本图书平均摆放在这样的5个书架上，每层应该摆放多少图书？
<gadget id="calculator">460 / 5 / 4</gadget>
<output>23</output>

<result>23</result>