Evaluate
7\sqrt{7}\approx 18.520259177
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\sqrt{7}\sqrt{7}\sqrt{7}
Factor 49=7\times 7. Rewrite the square root of the product \sqrt{7\times 7} as the product of square roots \sqrt{7}\sqrt{7}.
7\sqrt{7}
Multiply \sqrt{7} and \sqrt{7} to get 7.
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