A conical pile of sand is 3 meters high and the circumference of the bottom is 31.4. If each cubic meter of sand weighs 1.5 tons, how many tons does the pile of sand weigh?
一个圆锥形沙堆，高是3米，底面周长是31.4，如果每立方米的沙子重1.5吨，这堆沙子重多少吨．
<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 * 1.5</gadget>
<output>117.75</output>

<result>117.75</result>