For a triangle and a parallelogram with equal bases, if the height of the parallelogram is twice that of the triangle, then how many times the area of the parallelogram is the triangle.
底相等的三角形和平行四边形，如果平行四边形的高是三角形的2倍，则平行四边形的面积是三角形的多少倍．
<result>4</result>