28/33 умножить на 45/98 и поделтьб на 2 целых 3/11

28/33*45/98: 2 3/11=6/35

28/33*45/98=28*45/33*98=1260/3234=630/1617=90/231

90/231: 2 3/11=90/231: 25/11=90/231*11/25=90/525=18/105=6/35

во вложении.. ↓ ↓

6м70см=670см=67дм-30дм=37дм*67дм=2479дм

ответ: 2479дм