The school library originally had 907 storybooks, 416 were borrowed out, and 245 were returned later. How many storybooks are there in the library now?
学校图书室原有故事书907本，借出去416本，后来又还回来245本，图书室现在有故事书多少本？
<gadget id="calculator">907 - 416</gadget>
<output>491</output>

<gadget id="calculator">491 + 245</gadget>
<output>736</output>

<result>736</result>