A cone-shaped pile of sand has a base radius of 4.5 meters and a height of 2.4 meters. Each cubic meter of sand weighs 1.5 tons. How many tons does this pile of sand weigh?
一个圆锥形沙堆的底面半径是4.5米，高2.4米，每立方米沙重1.5吨，这堆沙共重多少吨？
<gadget id="calculator">4.5 ** 2</gadget>
<output>20.25</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3.14 * 20.25 * 2.4 * (1/3)</gadget>
<output>50.868</output>

<gadget id="calculator">1.5 * 50.868</gadget>
<output>76.302</output>

<result>76.302</result>