Wang Li reads a 240-page book, and there are 60 pages left after reading it for 6 days. How many pages do she read on average every day?
王丽看一本240页的书，看了6天后还剩60页，平均每天看多少页？
<gadget id="calculator">240 - 60</gadget>
<output>180</output>

<gadget id="calculator">180 / 6</gadget>
<output>30</output>

<result>30</result>