The volume of a cone is 47.1 cubic meters and the radius of the base is 3 meters. What is its height?
一个圆锥的体积是47.1立方米，底面半径是3米，它的高是多少．
<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">47.1 * 0.106157</gadget>
<output>4.999995</output>

<result>4.999995</result>