His old apartment cost 1200*12=$<<1200*12=14400>>14,400 per year

His new apartment 1200*1.4=$<<1200*1.4=1680>>1680 per month

That means it cost 1680/3=$<<1680/3=560>>560 per month

So it cost 560*12=$<<560*12=6720>>6720

So he saves 14400-6720=$<<14400-6720=7680>>7680

# Answer

7680
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
John and his two brothers decide to split the cost of an apartment.  It is 40% more expensive than John's old apartment which costs $1200 per month.  How much does John save per year by splitting the apartment compared to living alone?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
7680
John and his two brothers decide to split the cost of an apartment.  It is 40% more expensive than John's old apartment which costs $1200 per month.  How much does John save per year by splitting the apartment compared to living alone?
train