Evaluate
\frac{2\sqrt{66}}{33}\approx 0.492365964
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4\times \frac{\sqrt{66}}{\left(\sqrt{66}\right)^{2}}
Rationalize the denominator of \frac{1}{\sqrt{66}} by multiplying numerator and denominator by \sqrt{66}.
4\times \frac{\sqrt{66}}{66}
The square of \sqrt{66} is 66.
\frac{4\sqrt{66}}{66}
Express 4\times \frac{\sqrt{66}}{66} as a single fraction.
\frac{2}{33}\sqrt{66}
Divide 4\sqrt{66} by 66 to get \frac{2}{33}\sqrt{66}.
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