Найти значение выражения :2 1/3*1 4/7*1 4/11*1 4/19-2/3

$2 \frac{1}{3} * 1 \frac{4}{7} * 1 \frac{4}{11} * 1 \frac{4}{19} - \frac{2}{3} = \frac{7}{3} * \frac{11}{7} * \frac{15}{11} * \frac{23}{19} - \frac{2}{3} = \frac{7*11*15*23}{3*7*11*19} - \frac{2}{3} =$ $\frac{5*23}{19} - \frac{2}{3} = \frac{115}{19} - \frac{2}{3} = 6 \frac{1}{19} - \frac{2}{3} = 6 \frac{3}{57} - \frac{38}{57}$ = $5 \frac{60}{57} - \frac{38}{57} = 5 \frac{22}{57}$