[Help-gsl] matrix multiplication

[Keymone]

hello guys

help me please to multiplicate 2 matrices :)

gsl_matrix * A = gsl_matrix_alloc(n, n);
gsl_matrix * B = gsl_matrix_alloc(n, l);
gsl_matrix * AB = gsl_matrix_alloc(n, l);

cblas_dgemm(
       CblasRowMajor,
       CblasNoTrans,
       CblasNoTrans,
       ?, ?, ?, 1.0, ?, ?, ?, ?, 0, ?, ?);

it looks like primitive operation but i can't figure this out
i started with GSL only tomorrow so don't kill me :)

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Regards, Keymone