A cuboid log is 3 meters long and its cross section is a square with a side length of 0.4 meters. Cut off a section 2.5 meters long from this log. What is the remaining volume in cubic meters?
一根长方体木料，长3米，截面是一个边长0.4米的正方形，从这根木料上截下2.5米长的一段，剩下的体积是多少立方米？
<gadget id="calculator">3 - 2.5</gadget>
<output>0.5</output>

<gadget id="calculator">0.4 * 0.4 * 0.5</gadget>
<output>0.08</output>

<result>0.08</result>