Team A and Team B repair a road together. Team A has repaired the full length (2/5), and Team B has repaired the full length (1/3). What fraction is left?
甲乙两队合修一条路，甲队修了全长的(2/5)，乙队修了全长的(1/3)，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">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (2/5) - (1/3)</gadget>
<output>4/15 = around 0.266667</output>

<result>4/15 = around 0.266667</result>