(1 1/4) / (7/10)= (5/4) / (7/10)= (5*10)/(4*7)=50/28=25/14=1 11/14 - цена за метр
(1 11/14) * (2 1/4) = (25/14) * (9/4)= (25*9)/(14*4) = 225/56 = 4 1/56
(1 1/4) / (7/10)= (5/4) / (7/10)= (5*10)/(4*7)=50/28=25/14=1 11/14 - цена за метр
(1 11/14) * (2 1/4) = (25/14) * (9/4)= (25*9)/(14*4) = 225/56 = 4 1/56