cylindrical water cup with a bottom diameter of 20 cm is filled with water. A conical plumb weight with a bottom diameter of 6 cm and a height of 20 cm is completely submerged in the water. When the plumb weight is taken out, how many centimeters will the water in the cup drop?
一个底面直径20厘米的圆柱形水杯中装有水，水中完全没入一个底面直径6cm、高20cm的圆锥铅锤，铅锤取出时，杯中的水会下降几厘米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</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</gadget>
<output>314</output>

<gadget id="calculator">20 / 314</gadget>
<output>10/157 = around 0.063694</output>

<gadget id="calculator">(1/3) * 3.14 * 9 * (10/157)</gadget>
<output>0.6</output>

<result>0.6</result>