\[\boxed{\mathbf{1356}.}\]
\[1)\ a = 0,26:\]
\[5,4a - 3,9a = 1,5a =\]
\[= 1,5 \cdot 0,26 = 0,39\]
\[2)\ m = 3,94:\]
\[1,8m - 0,5m + 0,7m = 2m =\]
\[= 2 \cdot 3,94 = 7,88.\]
\[3)\ z = 8,2:\]
\[0,19z - 0,12z + 0,33z - 1,92 =\]
\[= 0,4z - 1,92 =\]
\[= 0,4 \cdot 8,2 - 1,92 =\]
\[= 3,28 - 1,92 = 1,36.\]