There is a cube fish tank in Xiaogang’s house. The length of the edge measured from the inside is 12 centimeters. After taking out two goldfishes of the same size, the water level drops by 0.4 centimeters. What is the volume of one goldfish in cubic centimeters?
小刚家有一正方体鱼缸，从里面量棱长是12厘米，取出两条同样大的金鱼后水面下降0.4厘米，一条金鱼的体积是多少立方厘米？
<gadget id="calculator">0.4 / 2</gadget>
<output>0.2</output>

<gadget id="calculator">12 * 12 * 0.2</gadget>
<output>28.8</output>

<result>28.8</result>