cele 8 tractoare ar fi terminat de lucrat in 28 zile
8 tractoare.......1/2 lot .......14 zile
8 tractoare.......1/28 lot........1 zi
1 tractor..............1/224 lot.....1 zi
14 tractoare......1/16 lot.......1 zi
14 tractoare ........1/2 lot .........8 zile
8+14= 22 zile
28-22 = 6 zile mai repede