Delete Columns 19, 20 and 23 if Column 27 has "898" in cells

I want to delete Column S (19), T (20) and W (23) only if column AA1 (27) has the number "898" in the cells.

I have used code:

Sub sbVBS_To_Delete_FirstFewColumns_in_Excel()

   Columns(19).EntireColumn.Delete

   Columns(19).EntireColumn.Delete

   Columns(21).EntireColumn.Delete

End Sub

but don't know to how to wright the condition to run this if column AA1 has "898" in the cells.