Bug? wrong multiplication result?

[ajk]

I have
Dim CenaDBL,RownaSieDBL, KrotnoscDBL, StaraKrotnoscDBL As Double

then in code:
RownaSieDBL = KrotnoscDBL*CenaDBL
I got:

CenaDBL=2.2
KrotnoscDBL=99999.0
RownaSieDBL=219997.80000000002

Something went wrong?

 

[sorex]

smells like a typical floating point issue. round it to 2 values behind the comma?

 

[Erel]

round it to 2 values behind the comma?

Never use Round2. Use NumberFormat when you want to show the value.

Binary floating point numbers cannot accurately represent decimal numbers. You should expect small errors.