There are 16 bookshelves in the school library, each with 5 floors, and 220 books on each floor. How many books are there in the school library?
学校图书室有16个书架，每个书架5层，每层放220本书，学校图书室一共有多少本书？
<gadget id="calculator">220 * 5</gadget>
<output>1_100</output>

<gadget id="calculator">1_100 * 16</gadget>
<output>17_600</output>

<result>17_600</result>