The height of a parallelogram is (4/5) decimeters, and its base is (1/2) high. What is the area of this parallelogram?
一个平行四边形的高是(4/5)分米，它的底是高的(1/2)，这个平行四边形的面积是多少．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(4/5) * (1/2)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) * (4/5)</gadget>
<output>8/25 = around 0.32</output>

<result>8/25 = around 0.32</result>