A square log is 10 meters long and its base is a square with a side length of 3 decimeters. What is its volume in cubic decimeters?
一根方木长10米，底面为边长3分米的正方形，它的体积是多少立方分米．
<gadget id="calculator">3 * 3 * 10 * 10</gadget>
<output>900</output>

<result>900</result>