For an approximate conical coal pile, the measured radius of its base is 5 meters and its height is 2.4 meters. If each cubic meter of coal weighs 1.4 tons, how many tons does this pile of coal weigh?
一个近似的圆锥形煤堆，测得它的底面半径是5米，高是2.4米．如果每立方米煤重1.4吨，这堆煤大约重多少吨？
<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 * 2.4</gadget>
<output>62.8</output>

<gadget id="calculator">62.8 * 1.4</gadget>
<output>87.92</output>

<result>87.92</result>