If the area of a parallelogram is 36 square centimeters, what is the area of a triangle with the same base and the same height as it?
一个平行四边形的面积是36平方厘米，与它等底等高的三角形的面积是多少平方厘米．
<gadget id="calculator">36 / 2</gadget>
<output>18</output>

<result>18</result>