$$\frac{20^{6}\times21^{5}}{30^{6}\times14^{5}}$$
$\frac{2}{3}\approx 0.666666667$
$$\frac{64000000\times 21^{5}}{30^{6}\times 14^{5}}$$
$$\frac{64000000\times 4084101}{30^{6}\times 14^{5}}$$
$$\frac{261382464000000}{30^{6}\times 14^{5}}$$
$$\frac{261382464000000}{729000000\times 14^{5}}$$
$$\frac{261382464000000}{729000000\times 537824}$$
$$\frac{261382464000000}{392073696000000}$$
$$\frac{2}{3}$$
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$\frac{2}{3} = 0.6666666666666666$
