Wang Ping made a plastic chalk box for the class. The length, width and height of this chalk box are 15 cm, 6 cm, and 6 cm. In order to be stronger, he pasted transparent tape on all edges of the chalk box. How many centimeters of tape did he use in total?
王平用塑料为班级做了一个粉笔盒，这个粉笔盒长宽高分别是15厘米、6厘米、6厘米．为了更结实，他在粉笔盒所有棱上贴上了透明胶布，他一共用了多少厘米胶布．
<gadget id="calculator">15 + 6 + 6</gadget>
<output>27</output>

<gadget id="calculator">27 * 4</gadget>
<output>108</output>

<result>108</result>