There are 12 bookshelves in the library, with an average of 56 books on each shelf, and 328 books have been lent out. How many books are there in the library?
图书馆共有12个书架，平均每个书架上放书56本，现已借出328本，图书馆里还有书多少本？
<gadget id="calculator">56 * 12</gadget>
<output>672</output>

<gadget id="calculator">672 - 328</gadget>
<output>344</output>

<result>344</result>