Answer
$$\frac{2\sqrt{42}}{3}$$
Work Step by Step
$$\frac{4\sqrt7}{\sqrt6}$$
$$\frac{4\sqrt7}{\sqrt6} \times \frac{\sqrt6}{\sqrt6}$$
$$\frac{4\sqrt{42}}{6}$$
$$\frac{2\sqrt{42}}{3}$$
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