The sum of the lengths of the sides of a cuboid is 36 centimeters, what is the sum of the lengths of the three sides starting from a vertex in centimeters?
一个长方体的棱长和是36厘米，从一个顶点出发的三条棱的长度和是多少厘米．
<gadget id="calculator">36 / 4</gadget>
<output>9</output>

<result>9</result>