A rope forms a rectangle with a length of 3.1m and a width of 14dm. If the rope is formed into a square, what is the area of the square in cm**2.
一根绳子围成一个长方形，长是3.1m，宽是14dm，如果把这根绳子围成一个正方形，这个正方形的面积是多少cm**2．
<gadget id="calculator">3.1 * 10</gadget>
<output>31</output>

<gadget id="calculator">31 + 14</gadget>
<output>45</output>

<gadget id="calculator">10 / 4</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">45 * 2 * (5/2) * 45 * 2 * (5/2)</gadget>
<output>50_625</output>

<result>50_625</result>