A pile of conical yellow sand has a base radius of 3 meters and a height of 1.2 meters. Each cubic meter of yellow sand weighs 1.5 tons. How many tons are there in this pile of yellow sand?
一堆圆锥形黄沙，底面半径3米，高1.2米．每立方米的黄沙重1.5吨，这堆黄沙一共有多少吨？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<gadget id="calculator">(1/3) * 3.14 * 9 * 1.2 * 1.5</gadget>
<output>16.956</output>

<result>16.956</result>