$$2 \frac{ 1 }{ 3 } 82 \sqrt{ 138 } \div 2$$
$\frac{287\sqrt{138}}{3}\approx 1123.828871908$
$$\frac{82\times \frac{6+1}{3}\sqrt{138}}{2}$$
$$\frac{82\times \frac{7}{3}\sqrt{138}}{2}$$
$$\frac{\frac{82\times 7}{3}\sqrt{138}}{2}$$
$$\frac{\frac{574}{3}\sqrt{138}}{2}$$
$$\frac{287}{3}\sqrt{138}$$
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