ry1 gives the solution .
Be careful about the nearest primes .
Just to check your common sense .
Please have a look at ry1.
Take the case of 120 cows for 30 days. Initiaally grass from 270 days is on the field. 30 days added means grass of 300 days.
The grass of 300 days is consumed by 120 cows in 30 days means it will be consumed by ... cows in 300 days.
Now there is 360 days' grass on the field which is consumed by 48 cows in 90 days . It will be consumed by ... cows 360 days.
In 270 days the whole field will be cleared off .
Details are given in ry1 .
750 000/3600 = 7 500/36 = 2500/12 = 2400/12 + 100/12 = 200 + ...
(12+20)/3 = 32/3 =10+2/3 ... .
101110111011/5055 = (2/10) x (101110111011/1011)= 2/10 x 100000000+10000+1) = (2/10)x100010001 = 200020002/10 = ?
This is the feedback!