Xiao Nan reads a 285-page story book, and reads an average of 35 pages a day in the first 4 days, and plans to finish the rest in 5 days. How many pages do she need to read on average every day?
小楠看一本285页的故事书，前4天平均每天看35页，剩下的打算5天看完，平均每天还要看多少页？
<gadget id="calculator">35 * 4</gadget>
<output>140</output>

<gadget id="calculator">285 - 140</gadget>
<output>145</output>

<gadget id="calculator">145 / 5</gadget>
<output>29</output>

<result>29</result>