Xinhua Bookstore newly purchased 25 story books and 16 literature and art books, and the total number of technology books and literature and art books purchased was 12 times that of story books. How many technical books does the bookstore buy?
新华书店新购进故事书25本、文艺书16本，购进的科技书与文艺书的总数是故事书的12倍．书店购进科技书多少本？
<gadget id="calculator">25 * 12</gadget>
<output>300</output>

<gadget id="calculator">300 - 16</gadget>
<output>284</output>

<result>284</result>