The perimeter of a square is 16 decimeters. Cut it into two identical small rectangles. What is the perimeter of one of the small rectangles?
一个正方形的周长是16分米，把它剪成两个完全一样的小长方形，其中一个小长方形的周长是多少分米．
<gadget id="calculator">16 / 4</gadget>
<output>4</output>

<gadget id="calculator">4 + 2</gadget>
<output>6</output>

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

<result>12</result>