If the base of a parallelogram is 5.5 meters and the height is 0.4 meters, what is the area of a triangle with the same base and height?
一个平行四边形的底是5.5米，高是0.4米，与它等底等高的三角形的面积是多少平方分米．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">5.5 * 0.4 * (1/2)</gadget>
<output>1.1</output>

<result>1.1</result>