A cone has a base diameter of 8 decimeters and a height of 3 decimeters, what is its volume in cubic decimeters?
一个圆锥的底面直径是8分米，高是3分米，它的体积是多少立方分米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">(1/3) * 3.14 * 4 * 4 * 3</gadget>
<output>50.24</output>

<result>50.24</result>