$$\frac{ { 8 }^{ 12 } }{ { 8 }^{ -4 } } \times \frac{ { 8 }^{ 2 } }{ { 10 }^{ 8 } }$$
$\frac{70368744177664}{390625}=180143985.09481984$
$$8^{16}\times \frac{8^{2}}{10^{8}}$$
$$281474976710656\times \frac{8^{2}}{10^{8}}$$
$$281474976710656\times \frac{64}{10^{8}}$$
$$281474976710656\times \frac{64}{100000000}$$
$$281474976710656\times \frac{1}{1562500}$$
$$\frac{70368744177664}{390625}$$
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$\frac{2 ^ {46}}{5 ^ {8}} = 180143985\frac{37039}{390625} = 180143985.09481984$