A rectangle with a length of 6 decimeters and a width of 4 decimeters, cut out the largest square, what shape is left, and how many square decimeters is the area of the remaining part?
一个长6分米，宽4分米的长方形，剪下一个最大的正方形，剩下一个什么形，剩下的部份的面积是多少平方分米？
<gadget id="calculator">6 - 4</gadget>
<output>2</output>

<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<result>8</result>