In a cylindrical bucket, put a section of round steel with a section radius of 5 cm. If the round steel is completely submerged in water, the water level in the bucket will rise by 12 cm. If the round steel in the water is exposed by 6 cm, the water in the bucket will rise. The water level drops by 2 cm, find the volume of this section of round steel.
在一个圆柱形水桶里，放进一段截面半径是5厘米的圆钢，如果圆钢全部浸没在水中时，桶里的水面上升12厘米，如果把水中的圆钢露出6厘米时，桶里的水面就下降2厘米，求这段圆钢的体积．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">5 * 5 * 3.14 * 3</gadget>
<output>235.5</output>

<gadget id="calculator">235.5 * 12</gadget>
<output>2_826</output>

<result>2_826</result>