You are going to have to be clearer what it is that you want to achieve with regard to 'pages'. There are no 'pages' in a Word document. Word is not a page layout application. You could insert five page breaks (see macro), but what would be the point of that?
Code:
Sub Macro1()
Dim i As Integer
Dim strPages As String
strPages = InputBox("How many pages?", , 5)
If IsNumeric(strPages) = False Then Exit Sub
If Not strPages = "" Then
For i = 1 To Val(strPages)
Selection.InsertBreak wdPageBreak
Next i
End If
End Sub