Cut out the largest square from a piece of paper with a length of 12 decimeters and a width of 8 decimeters. What is the shape of the remaining part? What is the area?
把一个长12分米，宽8分米的纸剪去一个最大的正方形，剩下的部分是什么图形？面积是多少？
<gadget id="calculator">12 - 8</gadget>
<output>4</output>

<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<result>32</result>