Detailed Instructions: You are given a math word problem and you are supposed to apply a single mathematical operator 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.
Q: dean knew that they are going to stay at the beach for a while so he brought 30 sets of clothes for every week of their stay . if dean is staying for 4 weeks there how many sets of clothes did he bring ?
A:
120