Use a 48cm long iron wire to make a square, what is the area of the square in cm**2.
用一根长48cm的铁丝做一个正方形，这个正方形的面积是多少cm**2．
<gadget id="calculator">48 / 4</gadget>
<output>12</output>

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

<result>144</result>