Evaluate
\frac{3\sqrt{66}}{11}\approx 2.215646838
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\frac{18\sqrt{66}}{\left(\sqrt{66}\right)^{2}}
Rationalize the denominator of \frac{18}{\sqrt{66}} by multiplying numerator and denominator by \sqrt{66}.
\frac{18\sqrt{66}}{66}
The square of \sqrt{66} is 66.
\frac{3}{11}\sqrt{66}
Divide 18\sqrt{66} by 66 to get \frac{3}{11}\sqrt{66}.
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