A piece of iron wire forms a square with a side length of 4 cm. If the wire is formed into a rectangle, the length is 6 cm and the width is how many cm.
一根铁丝围成一个边长为4厘米的正方形，若把这根铁丝围成一个长方形，长是6厘米，宽为多少厘米．
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">4 * 2</gadget>
<output>8</output>

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

<result>2</result>