If the side length of a square is increased by 10cm, the area is increased by 1300cm**2, what is the area of the original square in cm**2.
一个正方形的边长增加10cm，面积增加1300cm**2，原来正方形的面积是多少cm**2．
<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">1_300 / 100</gadget>
<output>13</output>

<result>13</result>