A story book has 620 pages, Ning Ning has read 156 pages, and the remaining 29 pages a day, how many days will it take to finish reading?
一本故事书有620页，宁宁已经读了156页，剩下的每天读29页，还要几天才能读完？
<gadget id="calculator">620 - 156</gadget>
<output>464</output>

<gadget id="calculator">464 / 29</gadget>
<output>16</output>

<result>16</result>