To make a cuboid wooden frame with a length of 7cm, a width of 4cm, and a height of 4cm, how many centimeters of wood do you need at least?
做一个长7cm、宽4cm、高4cm的长方体木框，至少需要多少厘米的木条．
<gadget id="calculator">7 + 4 + 4</gadget>
<output>15</output>

<gadget id="calculator">15 * 4</gadget>
<output>60</output>

<result>60</result>