The road repair team repaired a road, repaired the full length (2/5) in the first week, and repaired the same amount in the second week as the first week. How much is left unrepaired?
修路队修一条公路，第一周修了全长的(2/5)，第二周与第一周修得同样多．还剩几分之几没有修？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) + (2/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>