\(\overline{abc2}-\overline{2abc}=306\)
\(\Rightarrow\overline{abc}\times10+2-2000-\overline{abc}=306\)
\(\Rightarrow\overline{abc}\times9+2=2306\)
\(\Rightarrow\overline{abc}\times9=2304\)
\(\Rightarrow\overline{abc}=256\)
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