In a cylindrical water storage bucket, put a piece of round steel with a radius of 5 cm. If you put it all into the water, the water in the bucket will rise by 9 centimeters, and if you put the round steel in the water out of the water by 8 centimeters, then the water in the bucket will drop by 4 centimeters. What is the volume of the round bar in cubic centimeters?
在一个圆柱形的储水桶里，放入一段半径是5厘米的圆钢．如果把它全部放进水中，桶里的水就上升9厘米，如果把水中的圆钢露出水面8厘米，那么这时桶里的水就下降4厘米．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>