cuboid container is 30 cm long, 20 cm wide, and 15 cm high. After the container is filled with water, put a piece of iron into the water, causing the water to overflow, and then take out the iron block. At this time, the water surface in the container is 9 cm high. What is the volume of the iron block?
一个长方体容器，长30厘米，宽20厘米、高15厘米，容器内装满水后，将一块铁放入水中，导致水溢出，然后取出铁块，这时容器中的水面高9厘米，这个铁块体积是多少？
<gadget id="calculator">15 - 9</gadget>
<output>6</output>

<gadget id="calculator">30 * 20 * 6</gadget>
<output>3_600</output>

<result>3_600</result>