A cone-shaped pile of sand has a base radius of 2 meters and a height of 1.2 meters. If each cubic meter of sand weighs 1.8 tons, how many tons does the pile of sand weigh?
一个圆锥形的沙堆，测得它的底面半径为2米，高为1.2米，如果每立方米沙重1.8吨，这堆沙大约重多少吨？
<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 * 1.2</gadget>
<output>5.024</output>

<gadget id="calculator">5.024 * 1.8</gadget>
<output>9.0432</output>

<result>9.0432</result>