An approximately conical sand pile is 1.8 meters high and has a bottom radius of 5 meters. If each cubic meter of sand weighs about 2 tons, how many tons does this pile of sand weigh?
一个近似圆锥形的沙堆，高1.8米，底面半径5米，如果每立方米沙子约重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">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">(1/3) * 3.14 * 25 * 1.8 * 2</gadget>
<output>94.2</output>

<result>94.2</result>