The radius of the base of a cone is 3cm, the volume is 6.28cm**3, what is its height in cm?
一圆锥的底面半径是3cm，体积是6.28cm**3，它的高是多少cm．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

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

<gadget id="calculator">6.28 / (1/3) / 28.26</gadget>
<output>0.666667</output>

<result>0.666667</result>