If a wire 48 cm long is used to form the largest square, what is the area of the square?
用一根长48厘米的铁丝围成一个最大的正方形，这个正方形的面积是多少？
<gadget id="calculator">48 / 4</gadget>
<output>12</output>

<gadget id="calculator">12 ** 2</gadget>
<output>144</output>

<result>144</result>