A rectangular parallelepiped glass container with a length and width of 2dm is measured from the inside. 5L of water is poured into the container, and a potato is put into the water. The water depth in the container is measured to be 13cm. What is the volume of the potato?
一个长方体玻璃容器，从里面量长宽均为2dm，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13cm，这个土豆的体积是多少？
<gadget id="calculator">13 / 10</gadget>
<output>13/10 = around 1.3</output>

<gadget id="calculator">2 * 2 * (13/10)</gadget>
<output>26/5 = around 5.2</output>

<gadget id="calculator">(26/5) - 5</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>