Divide a circle with a circumference of 12.56cm into several equal parts and assemble it into an approximate rectangle. What is the circumference of this rectangle?
把一个周长是12.56cm的圆平均分成若干等分，拼成一个近似的长方形，那么这个长方形的周长是多少．
<gadget id="calculator">12.56 / 2 / 3.14</gadget>
<output>2</output>

<gadget id="calculator">12.56 / 2</gadget>
<output>6.28</output>

<gadget id="calculator">6.28 + 2</gadget>
<output>8.28</output>

<gadget id="calculator">8.28 * 2</gadget>
<output>16.56</output>

<result>16.56</result>