2-3 1/7*(2-1 9/11)разделить на 8/21

Решите задачу:

$2-3 \frac{1}{7} *(2-1 \frac{9}{11} )/ \frac{8}{21}$
$1) 2-1 \frac{9}{11} = \frac{2}{1} - \frac{20}{11} = \frac{22-20}{11} = \frac{2}{11}$
$2) \frac{1}{7} * \frac{2}{11} = \frac{1*2}{7*11} = \frac{2}{77}$
$3) \frac{2}{77} / \frac{8}{21} = \frac{2*21}{77*8} = \frac{1*21}{77*4} = \frac{21}{308}$
$4) 2- \frac{21}{308} = \frac{2}{1} - \frac{21}{308} = \frac{616-21}{308} = \frac{595}{308} = 1 \frac{287}{308} = 1 \frac{31}{44}$

2-3 1/7*(2-1 9/11)разделить ** 8/21