the answer is not 16 and I don't know how it's not 16 and I need someone to explain it to me what the real answer is cuz I already know what the real answer is and I don't understand how it's the real answer

the answer is not 16 and I dont know how its not 16 and I need someone to explain it to me what the real answer is cuz I already know what the real answer is an class=