To simplify the expression \( \frac{216\sqrt{3}}{27} \cdot \frac{1}{3} \), let's break it down step by step.
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Simplify the fraction \( \frac{216}{27} \): \[ 216 \div 27 = 8 \] So, \( \frac{216}{27} = 8 \).
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Combine the simplified result with \( \sqrt{3} \) and \( \frac{1}{3} \): \[ 8\sqrt{3} \cdot \frac{1}{3} \]
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Multiply \( 8 \) by \( \frac{1}{3} \): \[ 8 \cdot \frac{1}{3} = \frac{8}{3} \]
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Thus, the expression becomes: \[ \frac{8\sqrt{3}}{3} \]
Therefore, the simplified form of the expression \( \frac{216\sqrt{3}}{27} \cdot \frac{1}{3} \) is: \[ \frac{8\sqrt{3}}{3} \]