A parallelogram and a triangle have the same area and the same base. The height of the triangle is 6 cm. What is the height of the parallelogram in cm?
一个平行四边形和一个三角形的面积相等且底相等，三角形的高是6cm，平行四边形的高是多少cm．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<result>3</result>