A cuboid glass container, measured from the inside, is 2dm in length and width, pour 5L of water into the container, and then put an iron block into the water (the iron block is completely submerged in the water). The depth of water in such a container is 1.4dm. What is the volume of this iron block?
一个长方体玻璃容器，从里面量长、宽均为2dm，向容器中倒入5L升水，再把一个铁块放入水中(铁块完全浸没在水中)．这样量的容器内水深是1.4dm．这个铁块的体积是多少？
<gadget id="calculator">2 * 2 * 1.4</gadget>
<output>5.6</output>

<gadget id="calculator">5.6 - 5</gadget>
<output>0.6</output>

<result>0.6</result>