Situation: I am adjusting the projector. I can hear the noise from the audience comming from my right side.
Alternative situations: I am trying to turn on the projector in front of me so that I can can go back to my green chair to my right near the front of aisle. I am facing the projector so that I can use it for my presentation, the blackboard is to my left.
Question: How many chairs are on my left?