Weld a conical container with a fan-shaped iron sheet with an arc length of 3.14dm. Its volume is 15.7dm**3. What is the height of this conical container in dm?
用弧长3.14dm的扇形铁皮焊成一个圆锥形容器，它的容积是15.7dm**3，求这个圆锥形容器的高是多少dm？
<gadget id="calculator">3.14 / 3.14 / 2</gadget>
<output>0.5</output>

<gadget id="calculator">0.5 ** 2</gadget>
<output>0.25</output>

<gadget id="calculator">3.14 * 0.25</gadget>
<output>0.785</output>

<gadget id="calculator">3 / 0.785</gadget>
<output>3.821656</output>

<gadget id="calculator">15.7 * 3.821656</gadget>
<output>59.999999</output>

<result>59.999999</result>