You will be given a definition of a task first, then some input of the task.
You are given a math word problem and you are supposed to apply multiple mathematical operators like addition, subtraction, multiplication or division on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Sarah was planting vegetables in her garden . She started with 21 seeds and planted 12 of them in the big garden and in each of her small gardens put 3 seeds each . How many small gardens did Sarah have ?
Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
3