Evaluate
6\sqrt{91}\approx 57.236352085
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\sqrt{\frac{9840}{3}-4}
Multiply 12 and 820 to get 9840.
\sqrt{3280-4}
Divide 9840 by 3 to get 3280.
\sqrt{3276}
Subtract 4 from 3280 to get 3276.
6\sqrt{91}
Factor 3276=6^{2}\times 91. Rewrite the square root of the product \sqrt{6^{2}\times 91} as the product of square roots \sqrt{6^{2}}\sqrt{91}. Take the square root of 6^{2}.
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