If a square with side length 6 cm and a rectangle with length 8 cm have the same perimeter, what is the width of the rectangle in cm?
一个边长为6厘米的正方形和一个长是8厘米的长方形的周长相等，长方形的宽是多少厘米．
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

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

<gadget id="calculator">12 - 8</gadget>
<output>4</output>

<result>4</result>