The volume of a cone is 20 cubic decimeters, the area of the base is 15 square decimeters, what is its height?
一个圆锥的体积是20立方分米，底面积是15平方分米，它的高是多少分米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">20 / (1/3) / 15</gadget>
<output>4</output>

<result>4</result>