The area of the base of a cone is 9cm**2, the volume is 36cm**3, what is the height?
一个圆锥的底面积是9cm**2，体积36cm**3，高是多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">36 / (1/3) / 9</gadget>
<output>12</output>

<result>12</result>