There are 4 children, and their age happens to be one year older than the other, and the product of their ages is 5040. Q: How old is the youngest child?
有4个小朋友，他们的年龄恰好是一个比一个大1岁，他们年龄的积是5040．问：最小的小朋友几岁？
<result>7</result>