$$\frac{ 7 }{ 890 \times 7777777777 }$$
$\frac{1}{988888888790}\approx 1.011235955 \cdot 10^{-12}$
$$\frac{7}{6922222221530}$$
$$\frac{1}{988888888790}$$
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$\frac{1}{2 \cdot 5 \cdot 11 \cdot 41 \cdot 89 \cdot 271 \cdot 9091} = 1.0112359551573034 \times 10^{-12}$
