There is a cuboid whose length, width, and height are 10cm, 5cm, and 6cm respectively. What is the sum of its side lengths in cm?
有一个长方体，长、宽、高分别是10cm，5cm，6cm，它的棱长和是多少cm．
<gadget id="calculator">10 + 5 + 6</gadget>
<output>21</output>

<gadget id="calculator">21 * 4</gadget>
<output>84</output>

<result>84</result>