1. **State the problem:** We need to find the volume of a rectangular prism (which in this case is a cube-like shape) with dimensions 8 meters (height), 9 meters (width), and 9 meters (depth). 2. **Formula:** The volume $V$ of a rectangular prism is given by the formula: $$V = \text{length} \times \text{width} \times \text{height}$$ 3. **Apply the formula:** Here, length = 9 m, width = 9 m, and height = 8 m. 4. **Calculate the volume:** $$V = 9 \times 9 \times 8$$ 5. **Simplify step-by-step:** $$V = 81 \times 8$$ $$V = 648$$ 6. **Interpretation:** The volume of the rectangular prism is 648 cubic meters. **Final answer:** $$\boxed{648 \text{ cubic meters}}$$