A storybook has 240 pages in total. I have already read 156 pages. I plan to read the rest in a week. How many pages do I read on average every day?
一本故事书共240页，明明已经看了156页，剩下的打算一星期看完，剩下的平均每天看多少页？
<gadget id="calculator">240 - 156</gadget>
<output>84</output>

<gadget id="calculator">84 / 7</gadget>
<output>12</output>

<result>12</result>