A cube container with a side length of 10 cm is filled with water at a height of 5 cm. After putting a piece of iron into it, the water overflows the container. After taking out the piece of iron, the height of the water surface is 3 cm. What is the volume of the piece of iron?
一个边长为10cm的正方体容器，装了5cm高的水，把一块铁块放入后，水溢出了容器，取出铁块后，水面高为3cm，这块铁块的体积是多少．
<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">10 * 10 * 2</gadget>
<output>200</output>

<result>200</result>