cone-shaped pile of sand has a base radius of 4 meters and a height of 3 meters. If each cubic meter of sand weighs 2 tons, how many tons does the pile of sand weigh?
一个圆锥形的沙堆，底面半径是4米，高是3米，如果每立方米沙子重2吨，这堆沙子重多少吨？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">(1/3) * 3.14 * 16 * 3</gadget>
<output>50.24</output>

<gadget id="calculator">50.24 * 2</gadget>
<output>100.48</output>

<result>100.48</result>