Simplify $(3-i)(6+2i)$.
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Simplify $(3-i)(6+2i)$.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
20
Simplify $(3-i)(6+2i)$.
train