There is a rectangular piece of land with a width of 80 meters and an area of 12,800 square meters. The perimeter of this rectangular piece of land is equal to the perimeter of a square piece of land. What is the area of the square?
有一块长方形的地，宽是80米，面积是12800平方米；这块长方形地的周长与一块正方形地的周长相等，正方形地的面积是多少？
<gadget id="calculator">12_800 / 80</gadget>
<output>160</output>

<gadget id="calculator">160 + 80</gadget>
<output>240</output>

<gadget id="calculator">240 * 2</gadget>
<output>480</output>

<gadget id="calculator">480 / 4</gadget>
<output>120</output>

<gadget id="calculator">120 * 120</gadget>
<output>14_400</output>

<result>14_400</result>