There used to be 802 story books in the library, but 387 were lent out at noon, and 295 were returned before school in the afternoon. How many story books are there in the library now?
图书室原来有802本故事书，中午借出了387本，下午放学前还回295本，现在图书室里有故事书多少本？
<gadget id="calculator">802 - 387</gadget>
<output>415</output>

<gadget id="calculator">415 + 295</gadget>
<output>710</output>

<result>710</result>