Evaluate
21\sqrt{3}\approx 36.373066959
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8\times 3\sqrt{3}-3\sqrt{3}
Factor 27=3^{2}\times 3. Rewrite the square root of the product \sqrt{3^{2}\times 3} as the product of square roots \sqrt{3^{2}}\sqrt{3}. Take the square root of 3^{2}.
24\sqrt{3}-3\sqrt{3}
Multiply 8 and 3 to get 24.
21\sqrt{3}
Combine 24\sqrt{3} and -3\sqrt{3} to get 21\sqrt{3}.
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