An ant crawls along the edges of a cuboid carton with a length of 8 decimeters, a width of 4 decimeters, and a height of 7 decimeters. When it has climbed all the edges, how many decimeters has it crawled in total?
一只蚂蚁在一个长8分米，宽4分米，高7分米的长方体纸盒上沿着棱爬行，当它爬完所有棱时，一共爬了多少分米？
<gadget id="calculator">8 + 4 + 7</gadget>
<output>19</output>

<gadget id="calculator">19 * 4</gadget>
<output>76</output>

<result>76</result>