Build a (3/4) kilometer long canal in Qinfeng Village. The full length (3/10) was repaired on the first day, and the full length (1/3) was repaired on the second day. What fraction of the full length is left unrepaired?
勤丰村修一条长(3/4)千米的水渠．第一天修了全长的(3/10)，第二天修了全长的(1/3)．还剩全长的几分之几没有修？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (3/10) - (1/3)</gadget>
<output>11/30 = around 0.366667</output>

<result>11/30 = around 0.366667</result>