The bookstore bought 25 sets of story books and 18 sets of literature and art books, and the number of science books purchased was 12 times the total number of story books and literature and art books. How many sets of technology books does the bookstore buy?
书店购进故事书25套、文艺书18套，购进科技书的套数是故事书与文艺书总数的12倍．书店购进科技书多少套？
<gadget id="calculator">25 + 18</gadget>
<output>43</output>

<gadget id="calculator">43 * 12</gadget>
<output>516</output>

<result>516</result>