The math problem in the second volume of the fifth grade, Zhang Ming reads a book, reading 30 pages every day, and there are 5/8 pages left after 3 days. How many pages are there in this book?
Read 30 pages a day for 3 consecutive days:
30× 3 = 90 (page)
I haven't finished reading the book for 5/8, and I have read it for 3 days:
1-5/8=3/8
This book has * * *:
90 ÷ 3/8 = 240 (page)