What is the volume of a cone whose base is 40 square meters and whose height is 3 meters?
一个圆锥的底面积是40平方米，高是3米，体积是多少立方米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/3) * 40 * 3</gadget>
<output>40</output>

<result>40</result>