You mean 9 wins, right?
Commander costs 15.000
9 Wins are 2000 x 9 = 18.000
Or am i wrong here?
No you have the same mental deficiency as me. As Elchino pointed out to me playing a game gives you POINTS not SUPPLY
6000 POINTS earns you a drop - if you have the thing dropped already it automatically converts the drop to 500 SUPPLY
Commanders cost 15,000 supply so 30 drops (assuming no drops are new things you don't have). If you win every game it takes 3 games per drop (3 x 2000 points = 6000 points required for drop)
3 x 30 = 90 games
If you don't win so much it will take longer as a loss only gives 1500 points so 4 losses = 1 drop