A cone-shaped part has a base diameter of 4 cm and a height of 3 cm. What is its volume in cubic centimeters?
一个圆锥形零件，它的底面直径是4厘米，高3厘米，它的体积是多少立方厘米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

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

<gadget id="calculator">(1/3) * 3.14 * 4 * 3</gadget>
<output>12.56</output>

<result>12.56</result>