The school library bought a batch of new books, including 108 popular science books and 167 literature and art books. The number of story books is three times the sum of the number of popular science and literature. How many story books did the school buy?
学校图书馆买了一批新书，其中科普书有108本，文艺书有167本．故事书的本数是科普和文艺本数之和的3倍，学校买来故事书多少本？
<gadget id="calculator">108 + 167</gadget>
<output>275</output>

<gadget id="calculator">275 * 3</gadget>
<output>825</output>

<result>825</result>