Make a rectangular parallelepiped lantern frame with a length of 8cm, a width of 5cm and a height of 4cm. To make this rectangular parallelepiped lantern frame, at least how many centimeters of wooden strips are needed.
制作一个长方体的灯笼框架，长8cm，宽5cm，高4cm，做这个长方体的灯笼框架，至少需要多少厘米长的木条．
<gadget id="calculator">8 + 4 + 5</gadget>
<output>17</output>

<gadget id="calculator">17 * 4</gadget>
<output>68</output>

<result>68</result>