If the height of a cylinder is 20 cm and the area of its base is 12 cm2, what is the volume of a cone with the same base and height?
一个圆柱的高是20厘米，底面积是12平方厘米，与它等底等高的圆锥的体积是多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">12 * 20 * (1/3)</gadget>
<output>80</output>

<result>80</result>