A conical pile of sand has a bottom diameter of about 5 meters and a height of about 3.6 meters. If each cubic meter of sand weighs 1.5 tons, what is the mass of the pile of sand?
一个圆锥形的沙堆，底面直径约5米，高约3.6米，如果每立方米的沙重1.5吨，这堆沙子的质量是多少吨？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">(5/2) ** 2</gadget>
<output>25/4 = around 6.25</output>

<gadget id="calculator">(1/3) * 3.14 * (25/4) * 3.6 * 1.5</gadget>
<output>35.325</output>

<result>35.325</result>