In a cylindrical water storage bucket, put a piece of round steel with a radius of 6 cm. If it is completely put into the water, the water in the bucket will rise by 10 cm. If the round steel in the water is exposed to the water surface by 10 cm, then the water in the bucket will drop by 4 cm. Find the volume of the round bar.
在一个圆柱形储水桶里，放入一段半径为6厘米的圆钢，如果把它全部放进水中，桶里的水就上升10厘米．如果把水中的圆钢露出水面10厘米，那么这时桶里的水就下降4厘米．求圆钢的体积．
<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

<gadget id="calculator">10 / 4</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">3.14 * 36 * (5/2) * 10</gadget>
<output>2_826</output>

<result>2_826</result>