There is a square vegetable field, and one set of opposite sides is extended by 10%, and the other set of opposite sides is extended by 15%, and the area of the obtained rectangular vegetable field is increased by 106 square meters compared with the original square vegetable field. What is the area of the original square vegetable plot in square meters?
有一块正方形的菜地，把它的一组对边延长10%，另一组对边延长15%，这时得到的长方形菜地的面积比原来正方形菜地的面积增加了106平方米．问原来正方形菜地的面积是多少平方米？
<result>400</result>