book with 210 pages, Xiao Hua intends to read it in a week, and read a total of 70 pages in the first 3 days. If he wants to finish it on schedule, how many pages should he read on average every day?
一本书210页，小华打算一周看完，前3天共看70页，如果要按期看完，那么，接下来平均每天应看多少页？
<gadget id="calculator">210 - 70</gadget>
<output>140</output>

<gadget id="calculator">7 - 3</gadget>
<output>4</output>

<gadget id="calculator">140 / 4</gadget>
<output>35</output>

<result>35</result>