下面代码执行后，变量s的值为______。 Dim i, n As Integer, s As String i = 2 : n = 12 : s = n & "=" Do Until n = 1 Do While n Mod i = 0 s &= i & "*" n = n \ i Loop i += 1 Loop s = Strings.Left(s, Len(s) - 1)