$$4 \div 257 \div \frac{ 4 }{ 4 } 4=$$
$\frac{16}{257}\approx 0.062256809$
$$\frac{\frac{4}{257}}{1}\times 4$$
$$\frac{4}{257}\times 4$$
$$\frac{4\times 4}{257}$$
$$\frac{16}{257}$$
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$\frac{2 ^ {4}}{257} = 0.0622568093385214$