The sum of length and width of a rectangle is 14 cm, the sum of length and height is 11 cm, and the sum of width and height is 9 cm. Find the sum of the lengths of the sides of this rectangle.
一个长方形的长与宽的和是14厘米，长和高的和是11厘米，宽与高的和是9厘米，求这个长方形的棱长总和．
<gadget id="calculator">14 + 11 + 9</gadget>
<output>34</output>

<gadget id="calculator">34 * 2</gadget>
<output>68</output>

<result>68</result>