Situation: I am using chalk to write on blackboard and there are some chairs against the wall to my left.
Alternative situations: I just stood up to go write on the blackboard that is directly in front of me. There are two black chairs against the wall to my left. I turn 180 degrees to face the board and pretend to present the information on it, taking a few steps to my right to allow them to view it.
Question: What is bigger between the table directly behind me and the blackboard in front of me?