A cylindrical bucket with a base radius of 5 cm and a height of 30 cm is filled with water, and there is another conical empty bucket with a circumference of 62.8 cm at the top. Now pour the water in the cylindrical bucket into the conical bucket. When the conical bucket is full, there will be 10 cm of water left in the cylindrical bucket. Find the height of the conical bucket.
在一个底面半径为5厘米，高为30厘米的圆柱形水桶内装满了水，另有一个圆锥形的空水桶，它的上口周长为62.8厘米．现在把圆柱形水桶里的水往圆锥形水桶里倒，当圆锥形水桶装满时，圆柱形水桶还剩下10厘米的水，求圆锥形水桶的高．
<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">30 - 10</gadget>
<output>20</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">62.8 / 3.14 / 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">20 / (1/3) / 314</gadget>
<output>30/157 = around 0.191083</output>

<gadget id="calculator">3.14 * 25 * (30/157)</gadget>
<output>15</output>

<result>15</result>