A story book has 290 pages in total, Li Ming read 20 pages, the rest he wants to read 30 pages a day, how many days will he be able to finish this book?
一本故事书共290页，李明看了20页，剩下的他想每天看30页，再有几天他能看完这本书？
<gadget id="calculator">290 - 20</gadget>
<output>270</output>

<gadget id="calculator">270 / 30</gadget>
<output>9</output>

<result>9</result>