story book has 515 pages in total, Xiaoqiang read 312 pages, and planned to finish the rest in 7 days. During these 7 days, how many pages did Xiaoqiang read on average every day?
一本故事书共515页，小强看了312页，剩下的计划7天看完．在这7天里，小强平均每天要看多少页？
<gadget id="calculator">515 - 312</gadget>
<output>203</output>

<gadget id="calculator">203 / 7</gadget>
<output>29</output>

<result>29</result>