Droid uses 3 x 3 = <<3*3=9>>9 bags of coffee beans in the afternoon.
He uses 3 x 2 = <<3*2=6>>6 bags of coffee beans in the evening.
So, he uses a total of 3 + 9 + 6 = <<3+9+6=18>>18 bags of coffee beans every day.
Therefore, Droid uses a total of 18 x 7 = <<18*7=126>>126 bags of coffee beans every week.
#### 126