An approximately conical sand pile has a base radius of 1.5 meters and a height of 1.2 meters. If each cubic meter of sand weighs 1.4 tons, how many tons does the pile of sand weigh?
一个近似圆锥形的沙堆，底面半径是1.5米，高1.2米．如果每立方米的沙重1.4吨，这堆沙重多少吨？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1.5 ** 2</gadget>
<output>2.25</output>

<gadget id="calculator">(1/3) * 3.14 * 2.25 * 1.2</gadget>
<output>2.826</output>

<gadget id="calculator">2.826 * 1.4</gadget>
<output>3.9564</output>

<result>3.9564</result>