In a cuboid, if the sum of the lengths of the three sides intersecting at the same vertex is 30 cm, what is the sum of the lengths of the sides of the cuboid in cm?
在一个长方体中，相交于同一顶点的三条棱长之和是30厘米，则这个长方体的棱长总和是多少厘米．
<gadget id="calculator">30 * 4</gadget>
<output>120</output>

<result>120</result>