Xiaoting wants to read a 310-page novel, and read 22 pages a day for the first 5 days. If the remaining pages must be read within 5 days, how many pages do she need to read on average every day?
小婷要看一本310页的小说，前5天每天看22页，如果剩下的页数必须在5天内看完，平均每天要看多少页？
<result>20</result>