The library of Yucai Primary School originally had 860 storybooks, and after giving away 280 to kindergartens, the school bought 350 new ones. How many storybooks are there in the library now?
育才小学图书馆原有故事书860本，送给幼儿园280本后学校又新购买了350本，图书馆现在有故事书多少本？
<gadget id="calculator">860 - 280</gadget>
<output>580</output>

<gadget id="calculator">580 + 350</gadget>
<output>930</output>

<result>930</result>