Mingming borrowed a copy of "Harry Potter" from the school library for a week. This book has 497 pages in total. How many pages can he read on average every day before returning it on time?
明明从学校图书室借到了一本《哈利波特》，借阅时间是一周，这本书一共497页，他平均每天至少看多少页才能按期归还？
<gadget id="calculator">497 / 7</gadget>
<output>71</output>

<result>71</result>