A cube glass fish tank has a side length of 0.4 meters measured from the inside. How much water can this fish tank hold?
一个正方体的玻璃鱼缸，从里面量棱长是0.4米，这个鱼缸能装多少水？
<gadget id="calculator">0.4 * 0.4 * 0.4 * 1_000</gadget>
<output>64</output>

<result>64</result>