\[\boxed{\text{6.247.}}\]
\[\textbf{а)}\ 8,304\ :10 = 0,8304\ \]
\[\textbf{б)}\ 27,602\ :1\ 000 = 0,027602\]
\[\textbf{в)}\ 0,0731\ :100 = 0,000731\ \]
\[\textbf{г)}\ 0,35\ :10\ 000 = 0,000035\ \ \ \]