Had to dust off the old Math Is Fun McGraw-Hill textbookBreh what the fukk is this supposed to prove other than that you're wrong? You said its 1 and calling people "dumb motherfukkers". Did you even read what you posted?
The very next paragraph explains why it would be 9 in this situation.
"When you have a bunch of operations of the same rank, you just operate from left to right. For instance,15 ÷ 3 × 4 is not 15 ÷ (3 × 4) = 15 ÷ 12, but is rather (15 ÷ 3) × 4 = 5 × 4, because, going from left to right, you get to the division sign first."