Although, on further reflection, I have sometimes seen PEMDAS interpreted as P-E-M-D-A-S, as opposed to P-E-[MD]-[AS], which would give a result of 1.
It's unfortunate that "My Dear Aunt Sally" got stuck in everyone's head, because "Darn My Shoes Ache" is just a valid.
What I learned on my way to a BS in Physics was [MD] and [AS], but I also learned that if you want to be sure, add some parentheses to force the order you intend, even if they were superfluous, because that way you were sure your intention is clear.