A cuboid has a length of 8 cm, a width of 4 cm, and a height of 3 cm. What is the sum of its lengths in cm?
一个长方体的长8cm，宽4cm，高3cm．它的棱长总和是多少cm．
<gadget id="calculator">8 + 4 + 3</gadget>
<output>15</output>

<gadget id="calculator">15 * 4</gadget>
<output>60</output>

<result>60</result>