container is measured from the inside, its length is 5 decimeters, its width is 4 decimeters, and the water depth inside is 2.8 decimeters. After putting a piece of potato into the water, the water level rises to 4.3 decimeters. What is the volume of this potato?
一个容器从里面量，长5分米，宽4分米，里面的水深2.8分米，把一块土豆放入水中后，水面上升到4.3分米，这块土豆的体积是多少？
<gadget id="calculator">4.3 - 2.8</gadget>
<output>1.5</output>

<gadget id="calculator">5 * 4 * 1.5</gadget>
<output>30</output>

<result>30</result>