There is a cuboid whose length, width, and height are 7 cm, 5 cm, and 3 cm respectively. What is the sum of its edge lengths?
有一个长方体长、宽、高的长度分别是7厘米、5厘米、3厘米，它的棱长和是多少．
<gadget id="calculator">7 + 5 + 3</gadget>
<output>15</output>

<gadget id="calculator">15 * 4</gadget>
<output>60</output>

<result>60</result>