Evaluate
2\sqrt{111111}\approx 666.666333333
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2\sqrt{111111}
Factor 444444=2^{2}\times 111111. Rewrite the square root of the product \sqrt{2^{2}\times 111111} as the product of square roots \sqrt{2^{2}}\sqrt{111111}. Take the square root of 2^{2}.
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