There were 543 fairy tale books in the library. I lent 106 books to the second grade and 264 books to the third grade. How many books are left?
图书室原来有543本童话书．借给二年级106本，借给三年级264本，还剩多少本？
<gadget id="calculator">106 + 264</gadget>
<output>370</output>

<gadget id="calculator">543 - 370</gadget>
<output>173</output>

<result>173</result>