Put water at a height of 15 cm in a cuboid container with a bottom area of 20 cm2, and then submerge an iron part in the water. At this time, the height of the water surface is measured to be 19 cm. What is the volume of this part in cubic meters? centimeter.
在一个底面积为20平方厘米的长方体容器内放了15厘米高的水，再把一个铁制的零件浸没在水里，这时量得水面的高度为19厘米，这个零件的体积是多少立方厘米．
<gadget id="calculator">19 - 15</gadget>
<output>4</output>

<gadget id="calculator">20 * 4</gadget>
<output>80</output>

<result>80</result>