There are 15 bookshelves in the school library, each shelf has 6 floors, and each floor holds 170 books. How many books can be placed in total?
学校图书室有15个书架，每个书架有6层，每层放170本书，一共可以放多少本书？
<gadget id="calculator">170 * 6 * 15</gadget>
<output>15_300</output>

<result>15_300</result>