The volume of a cone is 6.28cm**3, the radius of the base is 2cm, and the height is cm.
一个圆锥的体积是6.28cm**3，底面半径是2cm，高是多少cm．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4</gadget>
<output>12.56</output>

<gadget id="calculator">6.28 / (1/3) / 12.56</gadget>
<output>1.5</output>

<result>1.5</result>