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Please answer the questions below correctly (round to the nearest unit, for instance : 9.5 is 10 and 9.4 is 9)

$\begin{vmatrix} 1 & -1 & 0 \\ -1 & 1 & 3 \\ 3 & 4 & 2 \\ \end{vmatrix} =$
$\sqrt{\pi\times77}=$