A pile of conical sand has a circumference of 25.12 meters at the bottom, a height of 1.2 meters, and a weight of 1.5 tons per cubic meter of sand. How many tons does this pile of sand weigh?
一堆圆锥形的沙子，底面周长是25.12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 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">25.12 / 3.14 / 2</gadget>
<output>4</output>

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

<gadget id="calculator">(1/3) * 3.14 * 16 * 1.2 * 1.5</gadget>
<output>30.144</output>

<result>30.144</result>