A conical pile of sand has a circumference of 6.28 meters. If the volume of the pile of sand is 1.57 cubic meters, what is the height of the pile of sand?
一个圆锥形砂堆，底面周长是6.28米，如果这堆砂子的体积是1.57立方米，那么这堆砂子的高是多少米？
<gadget id="calculator">6.28 / 3.14 / 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1 * 1</gadget>
<output>3.14</output>

<gadget id="calculator">1.57 / 3.14</gadget>
<output>0.5</output>

<gadget id="calculator">3 * 0.5</gadget>
<output>1.5</output>

<result>1.5</result>