Microsoft Windows 95 don't know calculation

Hello All, run this code in Visual Basic:

 Dim n1, n2 As Double
 n1 = 458
 n2 = 454.98
 MsgBox n1 - n2

Why ???  458-454.98 = 3.0199999999998

I see this problem in Microsoft Access, Visual Basic 5.0 and delphi 3.0

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458-454.98 = 3.0199999999998
???????????????????????????????????
Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug
ug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug
Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug
ug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug
Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug-Bug

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Wladimir Cesar Bianchi
Ribeirao Preto - SP - Brazil

Although this is not the cause of your problem, it is worth noting.

The correct syntax is:

Dim n1 As Double
Dim n2 As Double