Fill water into a cylindrical container with a base radius of 3 decimeters and a height of 4 decimeters, and then gently insert a cylindrical steel material with a bottom area of 3dm**2 and a height of 2 decimeters vertically (the water is submerged steel), what is the volume of overflowing water in milliliters?
往一个底面半径是3分米，高是4分米的圆柱形容器中注满水，再竖直轻轻插入一根底面积是3dm**2，高是2分米的圆柱形钢材(水没过钢材)，溢出水的体积是多少毫升．
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">6 * 1_000</gadget>
<output>6_000</output>

<result>6_000</result>