After a piece of iron wire forms a rectangle with a length of 8 decimeters and a width of 6 decimeters, there is still 3 decimeters left. How many decimeters was the original length of this iron wire?
一根铁丝，围成一个长8分米，宽6分米的长方形后，还剩3分米，这根铁丝原来长多少分米？
<gadget id="calculator">8 + 6</gadget>
<output>14</output>

<gadget id="calculator">14 * 2</gadget>
<output>28</output>

<gadget id="calculator">28 + 3</gadget>
<output>31</output>

<result>31</result>