Subtract the number of positive multiples of $3$ that are less than $20$ from the number of positive multiples of $6$ that are less than $20$.
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Subtract the number of positive multiples of $3$ that are less than $20$ from the number of positive multiples of $6$ that are less than $20$.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
-3
Subtract the number of positive multiples of $3$ that are less than $20$ from the number of positive multiples of $6$ that are less than $20$.
train