An irregular piece of copper is put into a container filled with water with a bottom diameter of 6 cm and a height of 8 cm. When it is taken out, the water level drops by 4 cm. If it is cast into a cone with a bottom radius of 2 cm, the height of the cone is How many centimeters is it?
一块不规则的铜块投入一个底面直径6厘米、高8厘米且装满水的容器中，再取出来，水面下降了4厘米，如果把它铸成底面半径2厘米的圆锥，则圆锥的高是多少厘米．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9 * 4</gadget>
<output>113.04</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4</gadget>
<output>12.56</output>

<gadget id="calculator">113.04 / 12.56</gadget>
<output>9</output>

<gadget id="calculator">9 * 3</gadget>
<output>27</output>

<result>27</result>