There are 562 story books in the school library, 208 more than literature and art books, and 42 more science and technology books than literature and art books. How many science and technology books are there in the school library?
学校图书室有故事书562本，比文艺书多208本，科技书的本数比文艺书的2倍多42本，学校图书室共有科技书多少本？
<gadget id="calculator">562 - 208</gadget>
<output>354</output>

<gadget id="calculator">354 * 2</gadget>
<output>708</output>

<gadget id="calculator">708 + 42</gadget>
<output>750</output>

<result>750</result>