If a rectangle has an area of 20 square meters, divide it into two smaller rectangles of equal size. What is the area of each smaller rectangle?
一个长方形的面积是20平方米，把它分成两个大小相等的小长方形，每个小长方形的面积是多少平方米．
<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<result>10</result>