Help with AddFieldDelimiters in a code block

Hello,

I am trying to do a field calculation using the CalculateField_management tool, which is run on shapefiles, feature classes in gdb, sde etc,. and would like know how to apply the AddFieldDelimiters function into the code block of the tool.

arcpy.CalculateField_management(BenefitArea_Final, "AREA_Ha", "Round ([F_AREA], 1) /10000", "VB", "")

Thanks ~ Rory