\[7,\ 14,\ 21,\ \ldots,182\]
\[d = 14 - 7 = 7;\ \ a_{n} = 182:\]
\[7 + 7 \cdot (n - 1) = 182\ \ \ |\ :7\]
\[1 + n - 1 = 26\]
\[n = 26\]
\[S_{26} = \frac{a_{1} + a_{26}}{2} \cdot 26 =\]
\[= (7 + 182) \cdot 13 =\]
\[= 189 \cdot 13 = 2457.\]
\[Ответ:2457.\]