In order to expand the collection of books in the school library, the students volunteered to donate their extracurricular books. Among them, the third-grade students donated 1080 books, and they should be placed in 5 bookshelves. Each bookshelf has 6 floors. On average, how many books are placed on each floor?
为了扩大学校图书室的藏书量，同学们主动捐出自己的课外书．其中三年级同学捐来图书1080本，要把它们摆在5个书架里，每个书架有6层，平均每层放几本书？
<gadget id="calculator">216 / 3</gadget>
<output>72</output>

<result>72</result>