\[\boxed{\mathbf{693\ (693)}\mathbf{.}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[386 = a + b + c + d\]
\[a\ :b\ :c\ :d = 18\ :45\ :60\ :70\]
\[18 + 45 + 60 + 70 = 193\ части.\]
\[386\ :193 = 2 - одна\ часть.\]
\[Ответ:386 =\]
\[= 36 + 90 + 120 + 140.\]