A cylindrical glass tank with a bottom diameter of 20 cm. A steel ball is placed in the water tank. The water level rises by 2 cm. What is the volume of the steel ball?
一个圆柱形玻璃缸，底面直径20厘米，把一个钢球放入水缸中，水面上升了2厘米，这个钢球的体积是多少？
<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>