If the area of a parallelogram is 50 square centimeters, what is the area of a triangle with the same base and height as it?
一块平行四边形的面积是50平方厘米，和它等底等高的三角形的面积是多少平方厘米．
<gadget id="calculator">50 / 2</gadget>
<output>25</output>

<result>25</result>