(6 2/11-5 1/77)*(17/35+1 2/5)*(8 1/9-5 7/18) найди значение выражения

(6 2/11-5 1/77)*(17/35+1 2/5)*(8 1/9-5 7/18)=
=(68/11-386/77)*(17/35+7/5)*(73/9-97/18)=
=(476-386)/77)*(17/35+49/35)*(146/18-97/18)=
=90/77*66/35*52/18=1560/245=312/49=6 18/49