\[\boxed{\text{5.456.}}\]
\[\textbf{б)}\ (336\ :21 + 7 \cdot 14) \cdot 1\ 255 =\]
\[= (16 + 98) \cdot 1\ 255 =\]
\[= 114 \cdot 1\ 255 = 143\ 070\ \]
\[\textbf{в)}\ (13\ 508\ :44 - 27) \cdot 100 =\]
\[= (307 - 27) \cdot 100 =\]
\[= 280 \cdot 100 = 28\ 000\ \]
\[\textbf{г)}\ (1\ 473 \cdot 45 - 715\ :11)\ :5 =\]
\[= (66\ 285 - 65)\ :5 =\]
\[= 66\ 220\ :5 = 13\ 244\ \]