The lengths of the three edges drawn from a vertex of a cuboid are 3cm, 4cm, and 5cm respectively, what is the sum of its edge lengths?
从长方体的一个顶点引出的三条棱的长度分别是3cm，4cm，5cm，则它的棱长总和是多少．
<gadget id="calculator">3 + 4 + 5</gadget>
<output>12</output>

<gadget id="calculator">12 * 4</gadget>
<output>48</output>

<result>48</result>