sand pile approximately conical has a base circumference of 9.42 meters and a height of 1.2 meters. If each cubic meter of sand weighs 1.5 tons, how many tons does this pile of sand weigh?
一个近似圆锥的沙堆，量得底面周长是9.42米，高是1.2米．若每立方米的沙子重1.5吨，这堆沙子约重多少吨？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">9.42 / 3.14 / 2</gadget>
<output>1.5</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 * 1.5</gadget>
<output>4.239</output>

<result>4.239</result>