(7/9 -1/6) ÷2/9 ×21/22= Помогите срочно

(14/18-3/18):2/9*21/22=11/18:2/9*21/22=11/18*9/2*21/22=11/2* *1/2*21/22=11/4*21/22=1/4*21/2=21/8=2,625