Divide a batch of books to Classes A, B, and C according to the two schemes of 2:3:4 or 2:4:5, and this batch of books can be divided exactly. How many books may there be in this batch.
把一批书按2：3：4或按2：4：5两种方案分给甲、乙、丙三个班，都可以将这批书正好分完，这批书可能有多少本．
<result>99</result>