A cuboid is 10 decimeters long, 8 decimeters wide, and 3 decimeters high. What is the sum of the lengths of the sides of this cuboid?
一个长方体，长10分米，宽8分米，高3分米．这个长方体的棱长之和是多少分米？
<gadget id="calculator">10 + 8 + 3</gadget>
<output>21</output>

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

<result>84</result>