$${ 2 }^{ 2 } /0.2/0.142857143/0.5$$
$\frac{40000000000}{142857143}\approx 279.99999972$
$$\frac{\frac{2^{2}}{0.2}}{0.142857143\times 0.5}$$
$$\frac{\frac{4}{0.2}}{0.142857143\times 0.5}$$
$$\frac{\frac{40}{2}}{0.142857143\times 0.5}$$
$$\frac{20}{0.142857143\times 0.5}$$
$$\frac{20}{0.0714285715}$$
$$\frac{200000000000}{714285715}$$
$$\frac{40000000000}{142857143}$$
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$\frac{2 ^ {12} \cdot 5 ^ {10}}{11 \cdot 13 \cdot 19 \cdot 52579} = 279\frac{142857103}{142857143} = 279.99999972$
