Divide a square with a side length of 6 cm into three equal rectangles, what is the area of each piece?
把一个边长是6厘米的正方形分成三个相等的长方形，每块的面积是多少．
<gadget id="calculator">6 / 3</gadget>
<output>2</output>

<gadget id="calculator">6 * 2</gadget>
<output>12</output>

<result>12</result>