A square wire frame with a side length of 8 cm is changed into a rectangle with a length of 9 cm. What is the width of this rectangle in cm?
一个边长8厘米的正方形铁丝框，改围成一个长9厘米的长方形，这个长方形的宽是多少厘米？
<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<gadget id="calculator">32 / 2</gadget>
<output>16</output>

<gadget id="calculator">16 - 9</gadget>
<output>7</output>

<result>7</result>