The school library has 8 bookshelves, each shelf has 5 floors, and each floor contains 45 books. How many books are there in the library?
学校的图书室有8个书架，每个书架有5层，每层有45本书，图书室一共有多少本书？
<gadget id="calculator">45 * 5 * 8</gadget>
<output>1_800</output>

<result>1_800</result>