There are 400 identical square logs, each with a cross-sectional area of 25dm**2 and a length of 4m. How many cubic meters are there in total?
有400根同样的方木，每根方木横截面的面积是25dm**2，长是4m，这些方木一共有多少立方米？
<gadget id="calculator">0.25 * 4 * 400</gadget>
<output>400</output>

<result>400</result>