\[\boxed{\mathbf{853}\mathbf{\ (721)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[\frac{8}{1};\ \frac{8}{2};\ \frac{8}{3};\ \frac{8}{4};\ \frac{8}{5};\ \frac{8}{6};\frac{8}{7};\ \frac{8}{8}.\]