The base of a parallelogram is 2.4 decimeters, and the height is half of the base. What is its area?
一个平行四边形的底是2.4分米，高是底的一半，它的面积是多少．
<gadget id="calculator">2.4 / 2</gadget>
<output>1.2</output>

<gadget id="calculator">2.4 * 1.2</gadget>
<output>2.88</output>

<result>2.88</result>