[RESOLVED] How to round the number for string data type field name?

I have problem here, I used text data type for all these field name. I don't know how to round these number. I got 3.4189189.. after calculating the value. How I can round these number to be like this 3.412 ?

Code:

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Fields("Hasil Kasar (kg)").Value = Text2.Text
        Text3.Text = Val(Text2.Text) / 1000 / Label10.Caption
        .Fields("Purata Hasil Kasar (Tan/ha)").Value = Text3.Text
        Text4.Text = Text2.Text - (Text2.Text * 17) / 100
        .Fields("Hasil Bersih (-17 %)").Value = Text4.Text
        Text5.Text = Text3.Text - (Text3.Text * 17) / 100
        .Fields("Purata Hasil Bersih (Tan/ha)").Value = Text5.Text

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Use Round() function:
=Round(Val(Text5.Text), 3)