The school library has 6 bookshelves, each shelf has 15 floors, and each floor holds 80 books. How many books can be placed in total?
学校图书馆有6个书架，每个书架15层，每层放80本书，一共能放多少本书？
<gadget id="calculator">15 * 6 * 80</gadget>
<output>7_200</output>

<result>7_200</result>