Найдите значение выражения 6/7*2/9+1/7*2/9=

Решите задачу:

$\frac{6}{7} \times \frac{2}{9} + \frac{1}{7} \times \frac{2}{9} = \frac{19}{84} \\ \\ 1) \frac{6}{7} \times \frac{2}{9} = \frac{6 \times 2}{7 \times 9} = \frac{2 \times 2}{7 \times 3} = \frac{4}{21} \\ \\ 2) \frac{1}{7} \times \frac{2}{9} = \frac{1 \times 2}{7 \times 9} = \frac{2}{56} = \frac{1}{28} \\ \\ \frac{4}{21} + \frac{1}{28} = \frac{19}{84}$