The school library bought back 24 science and technology books and 32 literature and art books. The number of story books bought back is three times that of science and art books combined. How many story books have been bought back?
学校图书室内买回科技书24本，文艺书32本．买回的故事书是科技书和文艺书的和的3倍，买回的故事书有多少本？
<gadget id="calculator">24 + 32</gadget>
<output>56</output>

<gadget id="calculator">56 * 3</gadget>
<output>168</output>

<result>168</result>