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?
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
#### 4160