A cone-shaped sand pile has a base diameter of 10 meters and a height of 1.8 meters. What is its volume in cubic meters?
一个圆锥形沙堆的底面直径是10米，高为1.8米，它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">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">(1/3) * 3.14 * 25 * 1.8</gadget>
<output>47.1</output>

<result>47.1</result>