$$\frac{ 4 }{ 470 \times 4444444444444 }$$
$\frac{1}{522222222222170}\approx 1.914893617 \cdot 10^{-15}$
$$\frac{4}{2088888888888680}$$
$$\frac{1}{522222222222170}$$
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$\frac{1}{2 \cdot 5 \cdot 47 \cdot 53 \cdot 79 \cdot 265371653} = 1.914893617021468 \times 10^{-15}$