The school library originally had 975 story books, but now it has bought 280 and lent 348. How many story books are there in the library now?
学校图书室原有故事书975本，现在又买来了280本，并借出了348本．现在图书室有故事书多少本？
<gadget id="calculator">280 - 348</gadget>
<output>-68</output>

<gadget id="calculator">975 + (-68)</gadget>
<output>907</output>

<result>907</result>