A rectangular bunker is (4/5) meters long and (1/2) wide, how many square meters does this bunker occupy?
一个长方形沙坑，长是(4/5)米，宽是长的(1/2)，这个沙坑占地多少平方米．
<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>