If the base of a parallelogram is 6.5 meters and the height is 4 meters, what is the area in square meters of the triangle with the same base and height?
一个平行四边形的底是6.5米，高是4米，与它等底等高的三角形面积是多少平方米．
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">6.5 * 2</gadget>
<output>13</output>

<result>13</result>