If the area of a parallelogram is 8 square decimeters, what is the area of a triangle with the same base and height?
一个平行四边形的面积是8平方分米，和它等底等高的三角形的面积是多少平方分米．
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<result>4</result>