A cylindrical container with a bottom diameter of 2 decimeters contains 10 cm of water. When an iron block is completely submerged in the water, the water level rises by 2 cm. What is the volume of the iron block?
一个底面直径是2分米的圆柱形容器中装有10厘米的水，把一个铁块完全浸没在水中，水面上升了两厘米，这个铁块的体积是多少．
<gadget id="calculator">2 * 10</gadget>
<output>20</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

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

<result>628</result>