$$0.19\div[0.72+\{1.4-(2.5-\overline{3.5-1.6)}\}]$$
$\frac{19}{472}\approx 0.040254237$
$$\frac{0.19}{0.72+1.4-\left(-1-1.6\right)}$$
$$\frac{0.19}{0.72+1.4-\left(-2.6\right)}$$
$$\frac{0.19}{0.72+1.4+2.6}$$
$$\frac{0.19}{0.72+4}$$
$$\frac{0.19}{4.72}$$
$$\frac{19}{472}$$
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$\frac{19}{59 \cdot 2 ^ {3}} = 0.04025423728813559$