There are 240 story books, 12 more than three times the number of science books. How many books are there in total?
故事书有240本，比科技书的3倍多12本，两种书一共多少本．
<gadget id="calculator">240 - 12</gadget>
<output>228</output>

<gadget id="calculator">228 / 3</gadget>
<output>76</output>

<gadget id="calculator">76 + 240</gadget>
<output>316</output>

<result>316</result>