A rope is used to form a rectangle whose width is 2.4 meters and whose length is 1.2 meters more than its width. If this rope is used to form a square, what is the area of the square in square meters?
用一根绳子围成宽是2.4米，长比宽多1.2米的长方形，若用这根绳子围成正方形，则正方形的面积是多少平方米？
<gadget id="calculator">2.4 + 1.2</gadget>
<output>3.6</output>

<gadget id="calculator">2.4 + 3.6</gadget>
<output>6</output>

<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">6 * (1/2)</gadget>
<output>3</output>

<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<result>9</result>