The area of a triangle is equal to the area of a parallelogram, and the bases are also equal. The height of the parallelogram is 6 decimeters, what is the height of the triangle.
三角形的面积和平行四边形的面积相等，底也相等．平行四边形的高是6分米，三角形的高是多少分米．
<gadget id="calculator">6 * 2</gadget>
<output>12</output>

<result>12</result>