I zi:|-----|-----|-----|-----|
II zi:|-----|-----|-----|-----|-----|-----|
III zi:|-----|-----|-----|-----|-----|-----|
IV zi:|-----|-----|-----|
al V-a zi => 54p
a III-a zi: => 54p
54×2=108p au ram in a II-a zi
a II-a zi => 108p
108×2=216p au rămas din I zi
I zi => 216:3=72p
72×4-288p are cartea
P=Pagini