Cut out the largest square on a piece of rectangular paper with a length of 4 decimeters and a width of 3 decimeters. Cut out the largest square from the paper. What is the area of this square in square decimeters?
在一张长4分米，宽3分米的长方形纸上剪下一个最大的正方形，纸上剪下一个最大的正方形，这个正方形的面积是多少平方分米．
<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<result>9</result>