The volume \( V \) of a prism can be calculated using the formula:
\[ V = \text{Base Area} \times \text{Height} \]
In this case, the base area of the octagonal prism is 24 square inches, and the height is 8 inches. Plugging in these values:
\[ V = 24 , \text{in}^2 \times 8 , \text{in} = 192 , \text{in}^3 \]
Thus, the volume of the prism is 192 cubic inches.