$$2\times\frac{22}{7}\times22$$
$\frac{968}{7}\approx 138.285714286$
$$\frac{2\times 22}{7}\times 22$$
$$\frac{44}{7}\times 22$$
$$\frac{44\times 22}{7}$$
$$\frac{968}{7}$$
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$\frac{2 ^ {3} \cdot 11 ^ {2}}{7} = 138\frac{2}{7} = 138.28571428571428$
