\[\boxed{\text{6.318.}}\]
\[\textbf{а)}\ 8,82\ :0,7 = 88,2\ :7 = 12,6\ \]
\[\textbf{б)}\ 0,184\ :0,8 = 1,84\ :8 = 0,23\ \]
\[\textbf{в)}\ 0,312\ :0,06 = 31,2\ :6 = 5,2\ \]
\[\textbf{г)}\ 0,00348\ :0,04 = 0,348\ :4 =\]
\[= 0,087\ \]
\[\textbf{д)}\ 0,515\ :0,5 = 5,15\ :5 = 1,03\ \]
\[\textbf{е)}\ 0,238\ :1,7 = 2,38\ :17 = 0,14\ \]
\[\textbf{ж)}\ 5,642\ :2,6 = 56,42\ :26 =\]
\[= 2,17\ \]
\[\textbf{з)}\ 0,0564\ :4,7 = 0,564\ :47 =\]
\[= 0,012\ \]