A conical sand pile has a base radius of 2 meters and a height of 1.5 meters. If each cubic meter of sand weighs 1.2 tons, how many tons does the pile of sand weigh?
一个圆锥形沙堆，底面半径是2米，高1.5米，如果每立方米的沙重1.2吨，这堆沙重多少吨？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">(1/3) * 3.14 * 4 * 1.5</gadget>
<output>6.28</output>

<gadget id="calculator">1.2 * 6.28</gadget>
<output>7.536</output>

<result>7.536</result>