A conical pile of sand is 2 meters high and 6 meters in diameter at the bottom. If it is put into a carriage with a width of 2.5 meters and a length of 3.1 meters, how high must the carriage be to hold the sand?
一个圆锥的砂堆，高2米，底面直径6米，如果把它装入一个车厢内，车厢宽2.5米，长3.1米，这个车厢至少要多高才能装下这些砂？
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3.14 * 9 * 2 * (1/3)</gadget>
<output>18.84</output>

<gadget id="calculator">18.84 / 2.5 / 3.2</gadget>
<output>2.355</output>

<result>2.355</result>