Xiao Ming has been reading a 180-page storybook for 3 days, with an average of 24 pages per day. The rest read an average of 36 pages a day, and it will take a few days to finish.
小明看一本180页的故事书，已经看了3天，平均每天看24页．剩下的平均每天看36页，还要几天才能看完．
<gadget id="calculator">24 * 3</gadget>
<output>72</output>

<gadget id="calculator">180 - 72</gadget>
<output>108</output>

<gadget id="calculator">108 / 36</gadget>
<output>3</output>

<result>3</result>