[tex]\overline{357a}=11\,\cdot \,? \\
pt.\;\;a=0 \;\;3570:11=324,5.... nu \;convine \;;\\
pt.\;\;\a=1\;\;3571:11=324,6..... nu\;convine\;;\\
..................................................................\\
pt.\;\;\fbox{a=5\;...\;3575\,minim\;:\;11=325}\;\surd\surd
[/tex]