cone-shaped sand pile has a base radius of 5 meters and a height of 4 meters. What is the volume of this pile of sand in cubic meters?
一个圆锥形沙堆，底面半径是5米，高是4米，这堆沙子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">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">(1/3) * 3.14 * 25 * 4</gadget>
<output>104.666667</output>

<result>104.666667</result>