Multiply. √3/2cis(2π/9)·√6/4cis(3π/2). Which is the answer?

To multiply  r₁·cis( theta₁ )  x  r₂·cis( theta₂)  =  r₁·r₂·cis( theta₁ + theta₂ )

[multiply the r-values and add the angles]

 

  √3/2cis(2π/9)·√6/4cis(3π/2)  =  ( 3/2 )·( √6/4 ) cis( 2π/9 + 3π/2 )

                                               =  ......