Make a rectangular parallelepiped glass frame with a length of 12 decimeters, a width of 1 meter, and a height of 0.6 meters, and inlaid metal strips on the edges of the glass frame. How long should the metal strips be at least?
做一个长12分米、宽1米、高0.6米的长方体玻璃框，给玻璃框的棱上镶上金属条，至少要多长的金属条？
<gadget id="calculator">12 / 10</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">1 + (6/5) + 0.6</gadget>
<output>2.8</output>

<gadget id="calculator">2.8 * 4</gadget>
<output>11.2</output>

<result>11.2</result>