There is a conical pile of yellow sand. The diameter of the bottom is 4 meters and the height is 1.5 meters. What is the volume of this pile of yellow sand in cubic meters?
有一个圆锥形黄沙堆，量得底面直径4米，高1.5米，这堆黄沙的体积是多少立方米？
<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 * 1.5</gadget>
<output>6.28</output>

<result>6.28</result>