Cut a square with a side length of 20 decimeters into 4 identical small squares, what is the area of the small squares?
把1个边长是20分米的正方形剪成4个完全一样的小正方形，小正方形的面积是多少平方分米？
<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 * 10</gadget>
<output>100</output>

<result>100</result>