A cuboid glass container, measured from the inside, is 2dm in length and width, pour 5L of water into the container, and then put a potato into the water. At this time, the water depth in the container is measured to be 1.3dm. What is the volume of this potato?
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水，再把一个土豆放入水中．这时量得容器内的水深是1.3dm．这个土豆的体积是多少？
<gadget id="calculator">2 * 2 * 1.3</gadget>
<output>5.2</output>

<gadget id="calculator">5.2 - 5</gadget>
<output>0.2</output>

<result>0.2</result>