There is a conical sand pile on the construction site, the circumference of the bottom surface is 31.4 meters, and the height is 3 meters. Each cubic meter of sand weighs 1.5 tons. How many tons does this pile of sand weigh?
工地上有一圆锥形的沙堆，底面周长是31.4米，高是3米．每立方米的沙重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">31.4 / 3.14 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">(1/3) * 3.14 * 25 * 3</gadget>
<output>78.5</output>

<gadget id="calculator">78.5 * 1.5</gadget>
<output>117.75</output>

<result>117.75</result>