How many centimeters of iron wire are needed to weld a rectangular parallelepiped frame with a length of 10 cm, a width of 6 cm, and a height of 4 cm?
用铁丝焊接成一个长10厘米，宽6厘米，高4厘米的长方体框架，至少需要多少厘米铁丝．
<gadget id="calculator">10 + 6 + 4</gadget>
<output>20</output>

<gadget id="calculator">20 * 4</gadget>
<output>80</output>

<result>80</result>