The radius of the bottom surface of a cylindrical container is 10 cm. When a piece of iron is put into the container, the water level rises by 2 cm. What is the volume of this piece of iron?
一个圆柱形容器的底面半径是10厘米，把一块铁放入这个容器后，水面上升2厘米，这块铁的体积是多少？
<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">3.14 * 100 * 2</gadget>
<output>628</output>

<result>628</result>