If the base of a parallelogram is 0.8 decimeters and the height is three times the base, what is its area in square decimeters?
一个平行四边形的底是0.8分米，高是底的3倍，它的面积是多少平方分米．
<gadget id="calculator">0.8 * 3</gadget>
<output>2.4</output>

<gadget id="calculator">0.8 * 2.4</gadget>
<output>1.92</output>

<result>1.92</result>