#### Answer

$\frac{4\sqrt {3}}{3}$

#### Work Step by Step

The given expression is
$=\frac{4}{\sqrt {3}}$
Multiply by $\frac{\sqrt {3}}{\sqrt {3}}$.
$=\frac{4}{\sqrt {3}}\cdot \frac{\sqrt {3}}{\sqrt {3}}$
Use product property of square roots.
$=\frac{4\sqrt {3}}{\sqrt {3\cdot 3}}$
Simplify.
$=\frac{4\sqrt {3}}{\sqrt {9}}$
Use $9=3^2$.
$=\frac{4\sqrt {3}}{\sqrt {3^2}}$
Simplify.
$=\frac{4\sqrt {3}}{3}$