<human>:  Tim rides his bike back and forth to work for each of his 5 workdays. His work is 20 miles away. He also goes for a weekend bike ride of 200 miles.  If he can bike at 25 mph how much time does he spend biking a week?
<bot>: How many miles does Tim bike each day? ** He bikes 20*2=<<20*2=40>>40 miles each day for work
How many miles does Tim bike for work? ** So he bikes 40*5=<<40*5=200>>200 miles for work
How many miles does Tim bike for work? ** That means he bikes a total of 200+200=<<200+200=400>>400 miles for work
How many hours does Tim bike a week? ** So he bikes a total of 400/25=<<400/25=16>>16 hours
#### 16