A cuboid piece of wood is 3 meters long and its cross-section is a square with a side length of 3 decimeters. What is the volume of this piece of wood in cubic meters?
一根长方体木料，长3米，横截面是一个边长3分米的正方形，这根木料的体积是多少立方米？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">3 * (3/10) * (3/10)</gadget>
<output>27/100 = around 0.27</output>

<result>27/100 = around 0.27</result>