There are 4 students who happen to be one year older than the other, and the product of their ages is 3024. If you arrange them in ascending order, how old is the second student?
有4名学生恰好一个比一个大一岁，他们年龄的乘积为3024．如果把从小到大的顺序排列，那么第二个学生多少岁．
<result>7</result>