$$\frac{ 22 }{ 7 } \times 2.1 \times 20.11C { M }^{ 2 }$$
$\frac{66363CM^{2}}{500}$
$$\frac{33}{5}\times 20.11CM^{2}$$
$$\frac{66363}{500}CM^{2}$$
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$\frac{66363M^{2}}{500}$