In a cylindrical bucket, put a cylindrical steel block with a bottom radius of 5cm vertically. If it is completely submerged in water, the water in the bucket will rise by 9cm. If it is exposed to the surface by 8cm, the water in the bucket will drop by 4cm. , Find the volume of the cylindrical steel block. (water not overflowing)
在一个圆柱形水桶里，竖直放一段底面半径是5cm的圆柱形钢块，如果把它完全浸入水中，桶里的水就上升9cm，如果把它露出水面8cm，桶里的水就下降4cm，求圆柱形钢块的体积．(水未溢出)
<gadget id="calculator">8 / 4</gadget>
<output>2</output>

<gadget id="calculator">2 * 9</gadget>
<output>18</output>

<gadget id="calculator">5 * 5 * 3.14 * 18</gadget>
<output>1_413</output>

<result>1_413</result>