\[\boxed{\text{6.320.}}\]
\[\textbf{а)}\ 742\ :0,14 = 74\ 200\ :14 =\]
\[= 5\ 300\]
\[\textbf{б)}\ 50,88\ :0,424 =\]
\[= 50\ 880\ :424 = 120\ \]
\[\textbf{в)}\ 136,29\ :0,059 =\]
\[= 136\ 290\ :59 = 2\ 310\ \]
\[\textbf{г)}\ 223,92\ :0,311 =\]
\[= 223\ 920\ :311 = 720\]
\[\textbf{д)}\ 1\ :0,8 = 10\ :8 = 1,25\ \]
\[\textbf{е)}\ 10\ :0,32 = 1000\ :32 = 3,125\]