There are 2,500 books in the school library, 346 books have been borrowed in the fourth grade, and 454 books have been borrowed in the fifth grade. How many books are left in the library?
学校图书室有2500本书，四年级借走了346本，五年级借走了454本，图书室还剩多少本书？
<gadget id="calculator">346 + 454</gadget>
<output>800</output>

<gadget id="calculator">2_500 - 800</gadget>
<output>1_700</output>

<result>1_700</result>