When a conical part is immersed in a cylindrical water container with a bottom diameter of 40 cm, the water level in the container rises by 4 cm. What is the volume of this conical part?
把一个圆锥形的零件浸入一个底面直径是40厘米的圆柱形的盛水容器里，容器里的水面上升了4厘米．这个圆锥形零件的体积是多少？
<gadget id="calculator">40 / 2</gadget>
<output>20</output>

<gadget id="calculator">20 ** 2</gadget>
<output>400</output>

<gadget id="calculator">3.14 * 400 * 4</gadget>
<output>5_024</output>

<result>5_024</result>