piece of iron wire is 65 meters long, and after forming a rectangle with a length of 18 meters, there are still 3 meters of iron wire left. What is the width of the enclosed rectangle?
一根铁丝长65米，围成一个长为18米的长方形后，还余下3米铁丝．围成的长方形的宽是多少米？
<gadget id="calculator">65 - 3</gadget>
<output>62</output>

<gadget id="calculator">62 / 2</gadget>
<output>31</output>

<gadget id="calculator">31 - 18</gadget>
<output>13</output>

<result>13</result>