A right Prison has a base in the shape of an octagon

927 Cubic Inches

Step-by-step explanation:

Area of Octagon, using the formula for finding the area of regular polygons (A = 1/2 x apothem x perimeter) : A = 1/2 x 4.83 x 4 (8) - > A = 77.28

Then using the Area of the base, you then multiply it with the height, and you get your volume: 77.28 x 12 = 927 cubic inches