今天做一道PREP的题怎么觉得不对劲啊，请大家指教

For all positive integers m,(m)=3m when m is odd and (m)=m/2 when m is even, which of the following is equivalent to (9)*(6)?

答案是27

不太明白~

恩 答案给的是27啊~

题错了或者答案错了吧