Feifei reads a 270-page storybook, 24 pages a day for 5 days, and the rest 30 pages a day, how many days will it take to finish it?
菲菲看一本270页的故事书，每天看24页，看了5天，余下的每天看30页，还要多少天才能看完？
<gadget id="calculator">24 * 5</gadget>
<output>120</output>

<gadget id="calculator">270 - 120</gadget>
<output>150</output>

<gadget id="calculator">150 / 30</gadget>
<output>5</output>

<result>5</result>