A wire can exactly form a circle with a diameter of 4 cm. If the circle 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直径4厘米的圆．如果把这个圆改成长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 / 2</gadget>
<output>2</output>

<gadget id="calculator">3.14 * 2</gadget>
<output>6.28</output>

<gadget id="calculator">6.28 - 6</gadget>
<output>0.28</output>

<result>0.28</result>