During the spring plowing season, an engineering team wanted to dredge a 3.05km long canal. On the first day, it dredged 1.36km, and on the second day it dredged 0.28km more than the first day. After two days, how many kilometers are still not dredged?
春耕时节，某工程队要疏通一条长3.05km的水渠，第一天疏通了1.36km，第二天比第一天多疏通0.28km．两天后还有多少千米没有疏通？
<gadget id="calculator">1.36 + 0.28 + 1.36</gadget>
<output>3</output>

<gadget id="calculator">3.05 - 3</gadget>
<output>0.05</output>

<result>0.05</result>