The volume of a cone is 30dm**3, the area of the base is 15dm**2, what is its height in dm?
一个圆锥的体积是30dm**3，底面积是15dm**2，它的高是多少dm．
<gadget id="calculator">3 / 15</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">30 * (1/5)</gadget>
<output>6</output>

<result>6</result>