If the area of the base of a cone is doubled and the height is reduced to 1/3, what is its volume?
如果把一个圆锥的底面积扩大到原来的2倍，高缩小为原来的(1/3)，则它的体积是原体积的多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/3) * 2</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>