Task: Question Answering
Input (English): Problem: the ratio between the number of sheep and the number of horses at the stewar farm is 4 to 7 . if each of horse is fed 230 ounces of horse food per day and the farm needs a total 12880 ounces of horse food per day . what is number sheep in the form ? ? 
Options: a ) 18 , b ) 28 , c ) 32 , d ) 56 , e ) 58
Output (English): c