A cuboid piece of wood is 2.5 meters long and has a cross-section of a square with sides 2 decimeters long. What is the volume of this log in cubic meters?
一根长方体木料，长2.5米，横截面是一个边长2分米的正方形．这根木料的体积是多少立方米？
<gadget id="calculator">2 / 10</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">2.5 * (1/5) * (1/5)</gadget>
<output>0.1</output>

<result>0.1</result>