After enclosing an iron wire into a rectangle with a length of 5 cm and a width of 2 cm, there is still 25 cm left. How long is the wire in cm?
把一根铁丝围成一个长5cm，宽2cm的长方形后，还剩下25cm，这根铁丝长多少cm？
<gadget id="calculator">5 + 2</gadget>
<output>7</output>

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

<gadget id="calculator">14 + 25</gadget>
<output>39</output>

<result>39</result>