A wire can exactly form a square with a side length of 4 cm. If the square is changed into a rectangle with a length of 6 cm, what is the width of the rectangle in cm?
一根铁丝可以正好围成边长4厘米的正方形．如果把这个正方形改成长6厘米的长方形，那么长方形的宽是多少厘米厘米．
<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<gadget id="calculator">16 / 2</gadget>
<output>8</output>

<gadget id="calculator">8 - 6</gadget>
<output>2</output>

<result>2</result>