Xiao Ming wants to use iron wire to make a cube gift box with a side length of 6.5 cm. What is the minimum length of iron wire (not counting the joints)?
小明要用铁丝做一个正方体礼品盒，棱长为6.5厘米，至少需要多长的铁丝(接头不计)？
<gadget id="calculator">6.5 * 12</gadget>
<output>78</output>

<result>78</result>