A cylindrical bucket has a bottom diameter of 4 cm. A conical plumb weight is submerged in water. The water level rises by 0.2 cm. The radius of the bottom of the plumb weight is 1 cm. What is the height of the plumb weight in cm?
一个圆柱形水桶，底面直径4厘米，把一个圆锥形铅锤浸没在水中，水面上升0.2厘米，已知这个铅锤底面半径1厘米，铅锤的高是多少厘米．
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

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

<gadget id="calculator">3.14 * 4 * 0.2</gadget>
<output>2.512</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1</gadget>
<output>3.14</output>

<gadget id="calculator">3 / 3.14</gadget>
<output>0.955414</output>

<gadget id="calculator">2.512 * 0.955414</gadget>
<output>2.4</output>

<result>2.4</result>