We have to know what is the relationship of 1km and 200 gram.
1kilogram is 1000 gram: kilo means thousand.
200 gram is 1/5th of 1000 gram: 1000/200 is 5 ( so 200 fits "five times" into 1000)
So we want to know how much does is cost when we want 1/5 of the original cheese, we have to divide the original prize by 5: 5.60/5=1.12
So the final prize is 1.12