The volume of a cone is 2 cubic meters, the area of the base is 12 square meters, and the height is in meters.
一个圆锥的体积是2立方米，底面积是12平方米，高是多少米．
<gadget id="calculator">3 / 12</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">2 * (1/4)</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>