There is a conical pile of sand on the construction site, the height is 1.5 meters, the radius of the bottom is 4 meters, and the sand weighs 1.5 tons per cubic meter. How many tons does this pile of sand weigh?
工地上有一个圆锥形的沙堆，高是1.5米，底面半径是4米，每立方米的沙重1.5吨，这堆沙重多少吨？
<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 * 1.5</gadget>
<output>25.12</output>

<gadget id="calculator">25.12 * 1.5</gadget>
<output>37.68</output>

<result>37.68</result>