A cuboid has a length of 5.6 decimeters, a width of 2.4 decimeters, and a height of 3.5 decimeters. Find the perimeter of the left side of the cuboid.
一个长方体的长5.6分米，宽2.4分米，高3.5分米，求这个长方体左面的周长．
<gadget id="calculator">2.4 + 3.5</gadget>
<output>5.9</output>

<gadget id="calculator">5.9 * 2</gadget>
<output>11.8</output>

<result>11.8</result>