conical sand pile has a base radius of 5 meters and a height of 4 meters. If each cubic meter of yellow sand weighs 2.4 tons, how many tons does this pile of yellow sand weigh?
一个圆锥形沙堆，底面半径是5米，高是4米，如果每立方米的黄砂重2.4吨，这堆黄砂重多少吨？
<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 * 2.4</gadget>
<output>251.2</output>

<result>251.2</result>