The volume of a cone is 30dm**3, the area of the base is 6dm**2, and the height is dm.
一个圆锥的体积是30dm**3，底面积是6dm**2，高是多少dm．
<gadget id="calculator">3 / 6</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">30 * (1/2)</gadget>
<output>15</output>

<result>15</result>