A conical container with a bottom circumference of 12.56dm and a height of 15dm is filled with water and poured into a cylindrical container with a bottom diameter of 20dm. What is the height of the water surface?
一个底面周长是12.56dm，高是15dm的圆锥形的容器中装满水，倒入底面直径是20dm的圆柱形容器中，水面高是多少？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">12.56 / 3.14 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">(1/3) * 3.14 * 4 * 15</gadget>
<output>62.8</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">3.14 * 100</gadget>
<output>314</output>

<gadget id="calculator">62.8 / 314</gadget>
<output>0.2</output>

<result>0.2</result>