Evaluate $6+5-4\times 3\div (2+1).$
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Evaluate $6+5-4\times 3\div (2+1).$
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
7
Evaluate $6+5-4\times 3\div (2+1).$
train