A cuboid has a length of 9 cm, a width of 5 cm, and a height of 4 cm. What is the sum of the lengths of the sides in cm?
一个长方体的长是9厘米，宽5厘米，高4厘米，棱长总和是多少厘米．
<gadget id="calculator">9 + 5 + 4</gadget>
<output>18</output>

<gadget id="calculator">18 * 4</gadget>
<output>72</output>

<result>72</result>