The length of a cuboid is 3 decimeters, the width is 2 decimeters, and the height is 1.5 decimeters. What is the sum of its sides?
一个长方体的长是3分米，宽是2分米，高是1.5分米，它的棱长总和是多少．
<gadget id="calculator">3 + 1.5 + 2</gadget>
<output>6.5</output>

<gadget id="calculator">6.5 * 4</gadget>
<output>26</output>

<result>26</result>