Circles with a perimeter of 12.56 decimeters are cut into a rectangle. What is the perimeter of the rectangle?
周长为12.56分米的圆剪拼成一个长方形，长方形的周长为多少分米．
<gadget id="calculator">12.56 / 3.14</gadget>
<output>4</output>

<gadget id="calculator">12.56 + 4</gadget>
<output>16.56</output>

<result>16.56</result>