$$19 \frac{ \sqrt{ 5 \div 0.2 } }{ 5.02 }$$
$\frac{4750}{251}\approx 18.924302789$
$$19\times \frac{\sqrt{\frac{50}{2}}}{5.02}$$
$$19\times \frac{\sqrt{25}}{5.02}$$
$$19\times \frac{5}{5.02}$$
$$19\times \frac{500}{502}$$
$$19\times \frac{250}{251}$$
$$\frac{19\times 250}{251}$$
$$\frac{4750}{251}$$
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$\frac{2 \cdot 19 \cdot 5 ^ {3}}{251} = 18\frac{232}{251} = 18.92430278884462$