A parallelogram plank has a base length of (4/5) meters and a height of (1/2) the base. What is the area of this board in square meters?
一块平行四边形木板，底长(4/5)米，高是底的(1/2)．这块木板的面积是多少平方米？
<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">(4/5) * (2/5)</gadget>
<output>8/25 = around 0.32</output>

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