There are 58 bookshelves in the reading room, with an average of 80 books on each shelf, and 386 books have been lent out. How many books are left?
阅览室有58个书架，平均每个书架放80本书，借出386本，还存多少本书？
<gadget id="calculator">80 * 58</gadget>
<output>4_640</output>

<gadget id="calculator">4_640 - 386</gadget>
<output>4_254</output>

<result>4_254</result>