Evaluate
231\sqrt{21}\approx 1058.574985535
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21\sqrt{33}\sqrt{77}
Multiply 3 and 7 to get 21.
21\sqrt{2541}
To multiply \sqrt{33} and \sqrt{77}, multiply the numbers under the square root.
21\times 11\sqrt{21}
Factor 2541=11^{2}\times 21. Rewrite the square root of the product \sqrt{11^{2}\times 21} as the product of square roots \sqrt{11^{2}}\sqrt{21}. Take the square root of 11^{2}.
231\sqrt{21}
Multiply 21 and 11 to get 231.
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