To make a cuboid frame with a length of 30cm, a width of 28cm, and a height of 10cm, how many centimeters of wood do you need at least?
制作一个长30cm，宽28cm，高10cm的长方体框架，至少需要多少厘米长的木条？
<gadget id="calculator">30 + 28 + 10</gadget>
<output>68</output>

<gadget id="calculator">68 * 4</gadget>
<output>272</output>

<result>272</result>