计算:tan60°=      .

有如下用户定义类型及操作语句：
Type Student
SNo As String
SName As String
IAge AS Integer
End Type
Dim Stu As Student
With Stu
.SNo＝“200609001”
.SName＝“陈果果”
.IAge＝19
End With
执行MsgBox Stu.IAge后，消息框的输出结果是______。