rectangle and a square have the same perimeter. If the length of the rectangle is 6 decimeters and the width is 2 decimeters, what is the area of the square in square meters?
一个长方形和一个正方形的周长相等，已知长方形的长是6分米，宽是2分米，那么正方形的面积是多少平方米．
<gadget id="calculator">6 + 2</gadget>
<output>8</output>

<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">8 * (1/2)</gadget>
<output>4</output>

<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<result>16</result>