There are 800 new books in the bookstore, 292 were sold in the morning and 249 were sold in the afternoon, how many books are left?
书店的有新书800本，上午卖出292本，下午卖出249本，还剩下多少本？
<gadget id="calculator">800 - 292 - 249</gadget>
<output>259</output>

<result>259</result>