There are 4 bookshelves in the library of Hope Elementary School, 215 books are placed on each shelf, 326 books are borrowed, how many books are left?
希望小学图书室有4个书架，每个书架上都放了215本书，借出326本，还剩多少本？
<gadget id="calculator">215 * 4</gadget>
<output>860</output>

<gadget id="calculator">860 - 326</gadget>
<output>534</output>

<result>534</result>