A wire can form a square with a side length of 8 decimeters. If it is changed into a rectangle, the length is 9 decimeters, and how many decimeters is the width?
一根铁丝可以围成边长是8分米的正方形，如果将它改围成一个长方形，长是9分米，宽是多少分米？
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

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

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

<result>7</result>