A cylindrical container, the diameter of the bottom surface measured from the inside is 8 cm, and the height is 6 cm. It is filled with water, and then a cylindrical iron rod with a length of 10 cm is vertically inserted into the water and its bottom surface is in contact with the bottom surface of the cylindrical container. At this time, some water overflowed. When the iron rod is taken out, the depth of the water is only 3 cm. What is the volume of this cylindrical iron rod?
一个圆柱形容器，从里面量底面直径是8厘米，高6厘米，在它里面装满水，然后把一个长10厘米的圆柱铁棒竖直插入水中并且它的底面和圆柱形容器底面接触，这时有一部分水溢出．当把这个铁棒取出后，水的深度只有3厘米，求这个圆柱形铁棒的体积是多少？
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">6 - 3</gadget>
<output>3</output>

<gadget id="calculator">3 / 6</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3.14 * 16 * (1/2) * 10</gadget>
<output>251.2</output>

<result>251.2</result>