(0,87m-0.66m)*10:2:3=0 0.21m*10:2:3=0 2.1m:2:3=0 1.05m:3=0 0.35m=0 m=0/0.35 m=0 10*(1,37k-0.12k):5:8=0 10*1.25k:5:8=0 12.5k:5:8=0 2.5k:8=0 5/16k=0 k=0/(5/16) k=0