Xiao Ming reads a 360-page storybook in his spare time, plans to read 60 pages a day, but actually reads 30 more pages a day, so that he can finish the storybook a few days earlier than originally planned?
小明课余时间看一本360页的故事书，计划每天看60页，实际每天多看30页，这样他可以比原计划提前几天看完这本故事书？
<gadget id="calculator">360 / 60</gadget>
<output>6</output>

<gadget id="calculator">60 + 30</gadget>
<output>90</output>

<gadget id="calculator">360 / 90</gadget>
<output>4</output>

<gadget id="calculator">6 - 4</gadget>
<output>2</output>

<result>2</result>