To build a road, the full length (1/5) was repaired on the first day, the full length (1/6) was repaired on the second day, and the full length (1/4) was repaired on the third day. How much is left to be repaired?
修一条公路，第一天修了全长的(1/5)，第二天修了全长的(1/6)，第三天修了全长的(1/4)，还剩多少没有修？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/5) - (1/6) - (1/4)</gadget>
<output>23/60 = around 0.383333</output>

<result>23/60 = around 0.383333</result>