The same wire forms a rectangle with a length of 9 cm and a width of 5 cm. What is the length of the wire in cm?
同一根铁丝围成一个长9厘米，宽5厘米的长方形，这根铁丝长多少厘米．
<gadget id="calculator">9 + 5</gadget>
<output>14</output>

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

<result>28</result>