If the base of a parallelogram is 2.8 meters and the height is 0.5 meters, what is the area in square meters of a triangle with the same base and height?
一个平行四边形底是2.8米，高是0.5米，与它等底等高的三角形的面积是多少平方米．
<gadget id="calculator">0.5 / 2</gadget>
<output>0.25</output>

<gadget id="calculator">2.8 * 0.25</gadget>
<output>0.7</output>

<result>0.7</result>