There is a pile of conical sand on a construction site, the radius of the bottom surface is 3m, the height is 1m, and the weight of each cubic meter of sand is about 1.2 tons. How many tons is this pile of sand?
某工地有一堆圆锥形沙子，底面半径是3m，高是1m，每立方米沙子约重1.2吨，这堆沙子有多少吨？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">(1/3) * 3.14 * 9 * 1</gadget>
<output>9.42</output>

<gadget id="calculator">9.42 * 1.2</gadget>
<output>11.304</output>

<result>11.304</result>