$$140 \div 5 \div 0.2 \times 5 \times 7 \times { 2 }^{ 2 }$$
$19600$
$$\frac{140}{5\times 0.2}\times 5\times 7\times 2^{2}$$
$$\frac{140}{1}\times 5\times 7\times 2^{2}$$
$$140\times 5\times 7\times 2^{2}$$
$$700\times 7\times 2^{2}$$
$$4900\times 2^{2}$$
$$4900\times 4$$
$$19600$$
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$2^{4}\times 5^{2}\times 7^{2}$
