If a piece of round steel with a radius of 5 cm is fully immersed in water in a cylindrical water storage bucket, the water level will rise by 9 cm. If the round steel is pulled vertically out of the water surface for a length of 8 cm, the water level will drop by 4 cm. What is the volume of this round steel in cubic centimeters?
在一个圆柱形储水桶里把一段半径是5厘米的圆钢全部浸没水中，水面就上升9厘米．如果把圆钢竖着拉出水面8厘米长后，水面就下降4厘米，求这段圆钢的体积是多少立方厘米？
<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">78.5 * (4/9)</gadget>
<output>34.888889</output>

<gadget id="calculator">200 / 34.888889</gadget>
<output>5.732484</output>

<gadget id="calculator">3.14 * 5.732484</gadget>
<output>18</output>

<gadget id="calculator">78.5 * 18</gadget>
<output>1_413</output>

<result>1_413</result>