主题：请教数字及单位在字符串中表达方式不一样，如何来判定？

Dim s1 As String = "甘草(500mg)"
Dim s2 As String = "甘草(0.5g)"
Dim s3 As String = "甘草(0.45g)"

If s2.Split("(")(1).Split(")")(0).Split("g")(0) * 1000 = s1.Split("(")(1).Split(")")(0).Split("m")(0) Then
    Output.Show("相等")
Else
    Output.Show("不等")
End If

If s3.Split("(")(1).Split(")")(0).Split("g")(0) * 1000 = s1.Split("(")(1).Split(")")(0).Split("m")(0)  Then
    Output.Show("相等")
Else
    Output.Show("不等")
End If