What is the smallest positive integer that is both a multiple of $7$ and a multiple of $4$?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
What is the smallest positive integer that is both a multiple of $7$ and a multiple of $4$?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
28
What is the smallest positive integer that is both a multiple of $7$ and a multiple of $4$?
train