2的四分之三次方除以三的三分之二次方乘以六的三分之二次方
=2^(3/4)/[3^(2/3)]*6^(2/3)
=2^(3/4)*2^(2/3)*3^(2/3)/[3^(2/3)]
=2^(3/4+2/3)
=2^(9/12+8/12)
=2^(17/12)