Evaluate
18\sqrt{7}\approx 47.623523599
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12\sqrt{7}+4\sqrt{7}+2\sqrt{7}
Factor 112=4^{2}\times 7. Rewrite the square root of the product \sqrt{4^{2}\times 7} as the product of square roots \sqrt{4^{2}}\sqrt{7}. Take the square root of 4^{2}.
16\sqrt{7}+2\sqrt{7}
Combine 12\sqrt{7} and 4\sqrt{7} to get 16\sqrt{7}.
18\sqrt{7}
Combine 16\sqrt{7} and 2\sqrt{7} to get 18\sqrt{7}.
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