class of students borrows a total of 60-70 science books and story books in the library, and the ratio of the number of science books to story books is 6:5. How many science books and story books are borrowed by this class of students?
某班学生在图书室借阅科技书和故事书本数一共在60-70本之间，且科技书、故事书本数的比为6：5，这班学生一共借阅科技书和故事书多少本．
<result>66</result>