If one base of a parallelogram is increased by 20%, the parallelogram becomes a right-angled trapezoid, and the area increases by 12 square centimeters. What is the area of the original parallelogram in square centimeters?
一个平行四边形，它的一个底增加20%，这个平行四边形就变成了直角梯形，面积增加了12平方厘米，原平行四边形的面积是多少平方厘米．
<result>120</result>