A piece of iron wire just forms a rectangle with a length of 5 meters and a width of 2 meters. How many meters is the length of the wire?
一根铁丝刚好围成一个长5米，宽2米的长方形，求铁丝长多少米？
<gadget id="calculator">5 + 2</gadget>
<output>7</output>

<gadget id="calculator">7 * 2</gadget>
<output>14</output>

<result>14</result>