Xiaoqing reads a 260-page storybook, and reads 20 pages a day for the first 3 days. If she reads the remaining 25 pages a day, how many days will it take to finish it?
小青看一本260页的故事书，前3天每天看20页，如果剩下的每天看25页，还要几天看完？
<gadget id="calculator">20 * 3</gadget>
<output>60</output>

<gadget id="calculator">260 - 60</gadget>
<output>200</output>

<gadget id="calculator">200 / 25</gadget>
<output>8</output>

<result>8</result>