A piece of iron wire is welded into a rectangular parallelepiped frame with a base circumference of 20 decimeters and a height of 6 decimeters (neglecting the weld joints), how long is the wire.
一根铁丝焊成了一个底面周长20分米，高6分米的长方体框架，(焊口接头忽略不计)，这根铁丝长多少．
<gadget id="calculator">20 * 2</gadget>
<output>40</output>

<gadget id="calculator">6 * 4</gadget>
<output>24</output>

<gadget id="calculator">40 + 24</gadget>
<output>64</output>

<result>64</result>