If the length, width and height of a cuboid are 5cm, 3cm and 1cm respectively, what is the sum of the lengths of the sides of the cuboid?
一个长方体的长、宽、高分别为5cm、3cm、1cm，这个长方体的棱长总和为多少．
<gadget id="calculator">5 + 3 + 1</gadget>
<output>9</output>

<gadget id="calculator">9 * 4</gadget>
<output>36</output>

<result>36</result>