A pile of sand has a diameter of 8 meters at the bottom and a height of 1.5 meters. If each cubic meter of sand weighs 1.5 tons, how many tons does the pile of sand weigh?
一堆圆锥形沙子，底面直径是8米，高是1.5米，如果每立方米沙子重1.5吨，那么这堆沙子重多少吨？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

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

<gadget id="calculator">(1/3) * 3.14 * 16 * 1.5 * 1.5</gadget>
<output>37.68</output>

<result>37.68</result>