<human>:  James buys 2 puzzles that are 2000 pieces each. He anticipates for these larger puzzles he can do 100 pieces every 10 minutes. So how long would it take to finish both puzzles?
<bot>: How many minutes does it take to do a piece? ** His speed means he can do 10/100=<<10/100=.1>>.1 minute per piece
How many minutes does it take to finish 1 puzzle? ** So he can finish 1 puzzle in 2000*.1=<<2000*.1=200>>200 minutes
How many minutes do these two puzzles take? ** So these two puzzles take 200*2=<<200*2=400>>400 minutes
#### 400