In a cylindrical bucket with a bottom radius of 20cm and a height of 55cm, a conical part is completely submerged. The bottom radius of the part is 10cm and the height is 30cm. When the part is taken out of the bucket, how many centimeters does the water level in the bucket drop?
在一个底面半径20cm，高55cm的圆柱形水桶里，完全浸没一个圆锥形零件，零件底面半径是10cm，高是30cm，当把零件从水桶了取出后，桶里的水面下降了多少厘米？
<gadget id="calculator">3.14 * 100 * 10</gadget>
<output>3_140</output>

<gadget id="calculator">3.14 * 100</gadget>
<output>314</output>

<gadget id="calculator">3_140 / 314</gadget>
<output>10</output>

<result>10</result>