A piece of wire can just enclose a square with a side length of 12 cm. How many centimeters is the length of this piece of wire?
用一段铁丝正好能围成一个边长12厘米的正方形，这段铁丝长多少厘米？
<gadget id="calculator">12 * 4</gadget>
<output>48</output>

<result>48</result>