The volume of a cone is 15cm**3, the area of the base is 4cm**2, what is the height?
一个圆锥的体积是15cm**3，底面积是4cm**2，高是多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">15 / (1/3) / 4</gadget>
<output>45/4 = around 11.25</output>

<result>45/4 = around 11.25</result>