3除以[9乘(27分之1减36分之1)]乘12=
问题描述：
3除以[9乘(27分之1减36分之1)]乘12=
答
3÷[9×(1/27-1/36)]×12
=3÷[9×1/27-9×1/36]×12
=3÷[1/3-1/4]×12
=3÷1/12×12
=3×12×12
=432
=432/7