What is the 4th root of 256 divided by 81?
4th root of 256 is 4
4/81 = 0.0493827160493827
You also could have meant:
\((\frac{256}{81})^{\frac{1}{4}} =\frac{256^{\frac{1}{4}}}{81^{\frac{1}{4}}} = \frac{4}{3}\)