$$7^{4}\times7^{-8}\div(7)^{2}$$
$\frac{1}{117649}\approx 0.0000085$
$$\frac{7^{-4}}{7^{2}}$$
$$\frac{1}{7^{6}}$$
$$\frac{1}{117649}$$
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$\frac{1}{7 ^ {6}} = 8.499859752314087 \times 10^{-6}$
