cone-shaped pile of sand has a base radius of 2 meters, a height of 1.2 meters, and a cubic meter of sand weighing 1.5 tons. How many tons does this pile of sand weigh?
一堆圆锥形的沙子，底面半径是2米，高1.2米，每立方米沙重1.5吨．这堆沙重多少吨？
<gadget id="calculator">1.2 / 3</gadget>
<output>0.4</output>

<gadget id="calculator">3.14 * 2 * 2 * 0.4</gadget>
<output>5.024</output>

<gadget id="calculator">1.5 * 5.024</gadget>
<output>7.536</output>

<result>7.536</result>