Normally, it was impossible to finish reading four books in seven days because the time needed to read a book varied from person to person, depending on reading speed, reading habits, reading ability, and the difficulty of the book. For some people, reading a few pages a day is enough, while for others, it may take hundreds of pages to understand the content. Therefore, whether or not one could finish reading four books in seven days depended on each person's situation.
张阿姨计划用7天看完一本小说那么她每天可以阅读小说的 $\frac{1}{7}$ 部分. 因此她5天可以阅读小说的 $\frac{1}{7}$ 的 $\frac{5}{7}$ 次方即 $\frac{1}{21}$ 的部分. 因此张阿姨5天可以阅读小说的 $\frac{1}{21}$ 的比例即 $\frac{1}{21}$ .
The answer to this question depends on many factors, such as how many pages each book has, how many words each book has, how much each book notes has to write, how much each person's work efficiency, and so on. Generally speaking, if each book had 100 pages and 5000 words in each reading note, it would take about 10 days to complete 50 reading notes and 4 books. But the actual situation will be different. If a book has many chapters or each reading note has more words or everyone's work efficiency is lower, the completion time may be longer. Therefore, the answer to this question was only for reference and needed to be calculated according to the actual situation.
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My answer might not be accurate. However, generally speaking, the free seven-day event may end at a certain time. The specific end time may vary according to factors such as the platform, website, or policy. If you have any questions about the end time of the event, it is recommended to consult the relevant platform or website customer service.
Xiaoling had read 80 pages in the past four days, so her average reading per day was 80/4=20 pages. The novel had a total of 300 pages. Xiaoling had read it for 4 days and had 240 pages left. Therefore, Xiaoling still needed (240 - 80 pages)/20 pages/day =12 days to finish all the books.
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