\[a_{1} = 8;\ \ \ \ d = 8;\ \ \ a_{n} \leq 192\]
\[a_{n} = a_{1} + (n - 1)d\]
\[8 + (n - 1) \cdot 8 \leq 192\]
\[8n - 8 \leq 184\]
\[8n \leq 192\]
\[n \leq 24.\]
\[S_{24} = \frac{2a_{1} + (24 - 1)d}{2} \cdot 24 =\]
\[= \frac{2 \cdot 8 + 23 \cdot 8}{2} \cdot 24 =\]
\[= 8 \cdot 25 \cdot 12 =\]
\[= 200 \cdot 12 = 2400\]
\[Ответ:2400.\]