There are 808 books in the school book corner, 265 books were lent out, and 147 books were returned later. How many books are there in the book corner now?
学校图书角有图书808本，借出265本，后来又还回147本，现在图书角有图书多少本？
<gadget id="calculator">808 - 265</gadget>
<output>543</output>

<gadget id="calculator">543 + 147</gadget>
<output>690</output>

<result>690</result>