If the base of a parallelogram is 5 cm and the height is 6 cm, what is the area of the triangle with the same base and height?
一个平行四边形的底是5cm，高是6cm，与它等底等高的三角形的面积是多少．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<result>15</result>