A cuboid container with a length of 20cm, a width of 10cm, and a height of 12cm contains 2L of water. After putting a coral into it (submerged in water), the water overflows by 0.8L. Find the volume of coral stone.
一个长为20cm，宽为10cm，高为12cm的长方体容器中装有2L水，放进一个珊瑚后(浸没在水中)水溢出了0.8L．求珊瑚石体积．
<gadget id="calculator">20 / 10</gadget>
<output>2</output>

<gadget id="calculator">10 / 10</gadget>
<output>1</output>

<gadget id="calculator">12 / 10</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">2 * 1 * (6/5)</gadget>
<output>12/5 = around 2.4</output>

<gadget id="calculator">0.8 - 2</gadget>
<output>-1.2</output>

<gadget id="calculator">(12/5) + (-1.2)</gadget>
<output>1.2</output>

<result>1.2</result>