help me pls im in class

${4\over 3}^3 = {4\over 3}\times {4\over 3}\times {4\over 3} = {64\over 9} = \color{brown}\boxed{7 {1\over9}}$

Actually $({4\over3})^3$ is $4^3\over3^3$, that simplifies to $64\over27$.

Thus the correct answer to this problem is $64/27$. 

Hint: 64/27 = 2 10/27