The workers repaired a 600-meter-long road. On the first day, they repaired the full length (1/4), and on the second day they repaired the full length (1/5) more than the first day. What fraction of the road is left unfinished?
工人们修一条长600米的路，第一天修了全长的(1/4)，第二天比第一天多修了全长的(1/5)，还剩几分之几没有修？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/4) + (1/4) + (1/5)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">1 - (7/10)</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>