In a cuboid, the sum of the three edges starting from a vertex is 75dm, what is the sum of the lengths of the edges of this cuboid in dm?
一个长方体中，从一个顶点出发的三条棱的和是75dm，这个长方体的棱长总和是多少dm．
<gadget id="calculator">75 * 4</gadget>
<output>300</output>

<result>300</result>