A piece of iron wire is 65 cm long, and after forming a rectangle with a length of 18 cm, there is still 3 cm of iron wire left. What is the width of this rectangle in centimeters?
一根铁丝长65厘米，围成一个长为18厘米的长方形后，还余下3厘米铁丝．围成的这个长方形的宽应是多少厘米？
<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>