After using a wire to form a rectangle with a length of 15 cm and a width of 12 cm, there is still 8 cm left. What is the original length of the wire?
用一根铁丝围成一个长15厘米、宽12厘米的长方形后，还剩8厘米，这根铁丝原来长多少厘米？
<gadget id="calculator">15 + 12</gadget>
<output>27</output>

<gadget id="calculator">27 * 2</gadget>
<output>54</output>

<gadget id="calculator">54 + 8</gadget>
<output>62</output>

<result>62</result>