A conical plumb bob has a base radius of 3 cm and a volume of 18.84 cubic centimeters. What is its height in centimeters?
一个圆锥体铅锤，底面半径是3厘米，体积是18.84立方厘米，它的高是多少厘米．
<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9</gadget>
<output>28.26</output>

<gadget id="calculator">3 / 28.26</gadget>
<output>0.106157</output>

<gadget id="calculator">18.84 * 0.106157</gadget>
<output>1.999998</output>

<result>1.999998</result>