Verified Answer :

To make this problem easy let's change fraction to  decimal.
So, our width is \(\frac{3}{2}\) = 1.5

Area of rectangular prism = l w h
                                             = 11 1.5 4
                                             = 66 inch³
Answer = 66 inch³

Hope this helps you  :)

66
1 1/2=1.5
41.511=66
66 inches