Jamie needs 1 bags of carrot
Solution:
Given that,
Jamie used 1/3 of a bag of carrots to make 1/6 of a gallon of stew
Jamie recipe is for 1 gallon of stew
Let "x" be the carrots needed for 1 gallon of stew
From given statement,

This forms a proportion and we can solve the sum by cross multiplying

Thus 2 bags of carrot is needed to make 1 gallon of stew
If she need to make
of the recipe, then bags of carrot needed are,

Thus she needs 1 bags of carrots