To build a road, the full length (1/12) was built on the first day, and the full length (2/15) was built on the second day. What fraction of the full length is left unrepaired?
修一条公路，第一天修了全长的(1/12)，第二天修了全长的(2/15)，还剩全长的几分之几没有修？
<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">2 / 15</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">1 - (1/12) - (2/15)</gadget>
<output>47/60 = around 0.783333</output>

<result>47/60 = around 0.783333</result>