1. The problem is to calculate the volume of a shape using $\pi$. 2. A common volume formula involving $\pi$ is the volume of a cylinder: $$V = \pi r^2 h$$ where $r$ is the radius and $h$ is the height. 3. Another common formula is the volume of a sphere: $$V = \frac{4}{3} \pi r^3$$ where $r$ is the radius. 4. To proceed, you need to specify the shape and the dimensions (radius, height, etc.). 5. For example, if calculating the volume of a cylinder with radius $r=3$ and height $h=5$, substitute into the formula: $$V = \pi \times 3^2 \times 5 = \pi \times 9 \times 5 = 45\pi$$ 6. Using $\pi \approx 3.1416$, the volume is approximately: $$V \approx 45 \times 3.1416 = 141.372$$ 7. If you provide the shape and dimensions, I can calculate the exact volume using $\pi$.