He bought the land for 200*70=$<<200*70=14000>>14000

He sold 200/2=<<200/2=100>>100 acres

He got 100*200=$<<100*200=20000>>20,000 from selling this

So he made a profit of 20,000-14,000=$<<20000-14000=6000>>6,000

# Answer

6000
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Mike decides to develop a plot of land.  He bought 200 acres for $70 per acre.  After development, he sold half of the acreage for $200 per acre.  How much profit did he make?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
6000
Mike decides to develop a plot of land.  He bought 200 acres for $70 per acre.  After development, he sold half of the acreage for $200 per acre.  How much profit did he make?
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