To use wire to form a cuboid with a length of 7 cm, a width of 5 cm, and a height of 2 cm, at least how many centimeters of wire should be used.
要用铁丝围成一个长7厘米、宽5厘米、高2厘米的长方体，至少要用铁丝多少厘米．
<gadget id="calculator">7 + 5 + 2</gadget>
<output>14</output>

<gadget id="calculator">14 * 4</gadget>
<output>56</output>

<result>56</result>