If a square with a perimeter of 28 centimeters surrounded by a piece of iron wire is changed into a rectangle with a width of 6 centimeters, what is the length of the rectangle in centimeters?
把用一根铁丝围成的周长是28厘米的正方形，改为成宽是6厘米的长方形，这个长方形的长应该是多少厘米？
<gadget id="calculator">28 / 2</gadget>
<output>14</output>

<gadget id="calculator">14 - 6</gadget>
<output>8</output>

<result>8</result>