\[\boxed{\mathbf{4.68}}\]
\[14 + 27 = 41\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 12 - 7 = 5\]
\[41 \cdot 5 = 205\]
\[250 - 150 = 55\]
\[27 + 24 = 51\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ 12 - 8 = 4\]
\[51 \cdot 4 = 204\]
\[245 + 204 = 449\]