If the length, width, and height of a cuboid are 6 cm, 5 cm, and 4 cm respectively, what is the sum of the lengths of its sides in cm?
一个长方体的长、宽、高分别是6厘米、5厘米、4厘米，它的棱长总和是多少厘米．
<gadget id="calculator">6 + 5 + 4</gadget>
<output>15</output>

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

<result>60</result>