By resolving the P(arenthetical) first, which includes both the inside and outside of the parenthesis. That side resolves to 6, so when we get to MD(ivide) it's 6 / 6, which of course equals 1.

People fight over what to do with parentheticals, which I find odd. It seems only natural that unless there's an operation sign between the number outside the parenthesis and the parenthesis itself, that the whole shebang attached to the parenthesis is a numerical "clause" that needs to be resolved as a chunk first (the P in PEMDAS) before it can be operated upon by other signs. I guess to other people, there is no significance in the fact that a digit can be stuck to the side of a parenthesis. They resolve what's outside first. Strikes me as odd.