Xiao Ming finished reading a book in 3 days, with an average of 20 pages per day. He read more than 20 pages every day for the first two days, and estimated the number of pages he read on the third day. Put a "√" under the answer you think is appropriate. How many pages did I read on the third day?
小明3天看完一本书，平均每天看20页．他前两天每天看的都超过了20页，估一估第三天看的页数．在你认为合适的答案下面画"√"．第三天看的比多少页少
<result>20</result>