He dances 4*2=<<4*2=8>>8 hours per week

He dances for 52*10=<<52*10=520>>520 weeks

So in total he danced for 8*520=<<8*520=4160>>4160 hours

# Answer

4160
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Tom dances 4 times a week for 2 hours at a time and does this every year for 10 years.  How many hours did he dance?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
4160
Tom dances 4 times a week for 2 hours at a time and does this every year for 10 years.  How many hours did he dance?
train