The sum of the lengths of the sides of a cuboid is 36 cm, what is the sum of the lengths of all the sides that intersect with a vertex in cm?
一个长方体棱长总和是36cm，相交与一个顶点的所有棱长之和是多少cm．
<gadget id="calculator">36 / 4</gadget>
<output>9</output>

<result>9</result>