The road repair team repaired a road, and repaired the full length (1/5) in the first week, and the full length (2/5) in the second day, what fraction of the full length is left?
修路队修一条路，第一周修了全长的(1/5)，第二天修了全长的(2/5)，还剩下全长的几分之几？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

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

<result>2/5 = around 0.4</result>