The school library bought 7 such bookshelves, each with 6 layers, and each layer can hold 80 books. How many books can these shelves hold?
学校图书馆买来这样的7个书架，每个书架有6层，每层可以放80本书．这些书架可以放多少本书？
<gadget id="calculator">6 * 7 * 80</gadget>
<output>3_360</output>

<result>3_360</result>