fish tank with a length of 50 cm, a width of 40 cm, and a height of 40 cm has a water depth of 25 cm. After putting a few goldfish, the water level rises by 3 cm. What is the volume of these goldfish in cubic decimeters?
一个长50cm，宽40cm，高40cm的鱼缸中水深25cm，放入几条金鱼后，水面上升了3cm．这几条金鱼的体积是多少立方分米？
<gadget id="calculator">3 / 1_000</gadget>
<output>3/1_000 = around 0.003</output>

<gadget id="calculator">50 * 40 * (3/1_000)</gadget>
<output>6</output>

<result>6</result>