Does PEMDAS should be applied here?

YES

PARENTHESIS THEN DIVISION AND MULTIPLICATION FROM LEFT TO RIGHT

48/2(9+3)
48/2(12)
24(12)
288

YOU GOT IT. YOU HAVE THE RIGHT ANSWER. I DO NOT KNOW WHERE THE 2 CAME FROM.
PLUS MOST CALCULATORS WILL DO PEMDAS FOR YOU.

-FNOOK

double check your calculator is working do 2+2 if it is right then it is 288 if not i don't know