The area of a parallelogram is 27cm**2, what is the area of the triangle with the same base and height.
一个平行四边形的面积是27cm**2，与它等底等高的三角形面积是多少．
<gadget id="calculator">27 / 2</gadget>
<output>27/2 = around 13.5</output>

<result>27/2 = around 13.5</result>