cuboid container is filled with some water. The bottom surface is a square with a side length of 20 cm. When an iron block is immersed in the water, the water level rises by 2 cm without overflowing. What is the volume of this iron block?
一个长方体容器装了一些水，底面是一个边长20厘米的正方形，把一个铁块浸入水中，水面升高2厘米，没有溢出．这铁块体积是多少？
<gadget id="calculator">20 * 20 * 2</gadget>
<output>800</output>

<result>800</result>