Answer:
44 millimeters
Step-by-step explanation:
Well, you already know that the scale drawing is 22 millimeters to 9 meters. You also know that the kitchen is 18 meters. So you can put it into an equation (I think you should be familiar with this).
22 millimeters (over) ? millimeters (over)
9 meters 18 meters
9 meters to 18 meters. You would need to find how you got to that. You could multiply 2 and 9 and you get 18 meters (or if you don't automatically know it's 2 you could divide 18 from 9 and get 2.). So what you do to one side you need to do to the other. 22 millimeters times 2 equals 44. Therefore, it is 44 millimeters long.
Also, I could see through your deception, Kakashi. :)