The school library recently bought a batch of books, including 108 science and technology books, and 12 more fairy tale books than science and technology books. How many new fairy tale books did the library buy?
学校图书室最近新买了一批图书，其中科技类图书有108本，童话类图书是科技类图书的3倍还多12本．图书馆新买童话类图书多少本？
<gadget id="calculator">108 * 3</gadget>
<output>324</output>

<gadget id="calculator">324 + 12</gadget>
<output>336</output>

<result>336</result>