A cylindrical container with a bottom diameter of 10 cm and a height of 8 cm contains some water. When a stone is completely immersed in the water, 200 ml of water overflows. Take out the stone, and the water surface is 2cm away from the top of the container. Find the volume of the stone.
一个底面直径是10cm，高是8cm的圆柱形容器中装着一些水，把一个石块完全侵入水中后溢出了200ml水．取出石块，此时水面距离容器顶端2cm．求石块的体积．
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">3.14 * 25 * 2</gadget>
<output>157</output>

<gadget id="calculator">157 + 200</gadget>
<output>357</output>

<result>357</result>