The school library bought 170 animation and comic books, 10 less than the literature and art books, and bought 4 times as many science and technology books as the literature and art books. How many science and technology books were bought?
学校图书馆买来动漫画书170本，比买来的文艺书少10本，买来的科技书是文艺书的4倍，买来科技书多少本？
<gadget id="calculator">170 + 10</gadget>
<output>180</output>

<gadget id="calculator">180 * 4</gadget>
<output>720</output>

<result>720</result>