If the perimeter of two squares differs by 20 cm and the area differs by 275 cm2, what is the area of the larger square in cm2?
两个正方形的周长相差20厘米，面积相差275平方厘米，则大正方形的面积是多少平方厘米．
<gadget id="calculator">300 / 10</gadget>
<output>30</output>

<gadget id="calculator">30 * 30</gadget>
<output>900</output>

<result>900</result>