Two iron wires of the same length are used to form a rectangle and a square respectively. The length of the rectangle is 80 cm and the width is 40 cm. What is the area of the enclosed square?
用同样长的两根铁丝分别围成一个长方形和一个正方形，长方形的长是80厘米，宽是40厘米，围成的正方形的面积是多少平方厘米？
<gadget id="calculator">80 + 40</gadget>
<output>120</output>

<gadget id="calculator">120 * 2</gadget>
<output>240</output>

<gadget id="calculator">240 / 4</gadget>
<output>60</output>

<gadget id="calculator">60 * 60</gadget>
<output>3_600</output>

<result>3_600</result>