Cut a largest square from a rectangle with a length of 8 decimeters and a width of 5 decimeters. What is the area of the largest square?
在长8分米，宽5分米的长方形里剪一个最大的正方形，这个最大的正方形的面积是多少．
<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<result>25</result>