There are 8 bookcases in the school library, each bookcase has 4 floors, and each floor contains 108 books. How many books are there in total in this library?
学校图书室里有8个书柜，每个书柜有4层，每层放图书108本，这个图书室一共放图书多少本？
<gadget id="calculator">108 * 4 * 8</gadget>
<output>3_456</output>

<result>3_456</result>