The task is to generate the correct answer for a given math problem.

Problem: how many prime numbers are between 51 / 13 and 89 / 9 ?
2

Problem: a person want to give his money of $ 1800 to his 3 children a , b , c in the ratio 2 : 3 : 4 . what is the b ' s share ?
$ 600

Problem: from the sale of sleeping bags , a retailer made a gross profit of 16 % of the wholesale cost . if each sleeping bag was sold for $ 28 , what was the wholesale cost per bag ?
24.13