$$(28.7\times42.6)\times71.86$$
$87857.4732$
$$1222.62\times 71.86$$
$$87857.4732$$
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$\frac{3 \cdot 7 \cdot 41 \cdot 71 \cdot 3593}{2 ^ {2} \cdot 5 ^ {4}} = 87857\frac{1183}{2500} = 87857.4732$
