A conical pile of sand is 1.8 meters high and has a base radius of 5 meters. How many cubic meters does this pile of sand have?
一个圆锥形沙堆，高是1.8米，底面半径是5米，这堆沙有多少立方米？
<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 * 1.8</gadget>
<output>47.1</output>

<result>47.1</result>