After an iron wire forms a rectangle with a length of 18 cm and a width of 10 cm, there is still 18 cm left. How long is the wire in cm?
一根铁丝围成一个长18厘米，宽10厘米的长方形后，还剩18厘米，这根铁丝长多少厘米？
<gadget id="calculator">18 + 10</gadget>
<output>28</output>

<gadget id="calculator">28 * 2</gadget>
<output>56</output>

<gadget id="calculator">56 + 18</gadget>
<output>74</output>

<result>74</result>