There is a glass cylinder in the shape of a cuboid, 3 decimeters long, 2 decimeters wide, and 2 decimeters high, filled with water to a depth of 1 decimeter. After a glass ball is placed in a glass jar, water overflows to a height of 0.3 decimeters. What is the volume of the glass ball in cubic decimeters?
有一个长方体形状的玻璃缸，长3分米，宽2分米，高2分米，里面盛有水，水深1分米．在玻璃缸中放入一个玻璃球后，溢出了高度为0.3分米的水，玻璃球的体积是多少立方分米？
<gadget id="calculator">0.3 - 1</gadget>
<output>-0.7</output>

<gadget id="calculator">2 + (-0.7)</gadget>
<output>1.3</output>

<gadget id="calculator">3 * 2 * 1.3</gadget>
<output>7.8</output>

<result>7.8</result>