In a cylindrical water storage bucket, a section of cylindrical steel with a bottom radius of 4 cm is put into the water, and the water level rises by 10 cm. Pull this piece of steel vertically out of the water surface by 6 cm, and the water level drops by 4 cm. Find the volume of this piece of steel.
在一个圆柱形储水桶里，把一段底面半径为4厘米的圆柱形钢材全部放入水中，这时水面上升10厘米．把这段钢材竖着拉出水面6厘米，水面下降4厘米．求这段钢材的体积．
<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3.14 * 16 * 6</gadget>
<output>301.44</output>

<gadget id="calculator">301.44 / 20.096</gadget>
<output>15</output>

<gadget id="calculator">50.24 * 15</gadget>
<output>753.6</output>

<result>753.6</result>