There are 24 comic books and 15 story books in the book corner. After lending 32 copies, how many copies are left?
图书角有连环画24本，故事书15本．借出32本后，还剩多少本？
<gadget id="calculator">24 + 15</gadget>
<output>39</output>

<gadget id="calculator">39 - 32</gadget>
<output>7</output>

<result>7</result>