<human>:  John takes a 10-minute shower every other day for 4 weeks. If his shower uses 2 gallons of water per minute. How much water does he use in those 4 weeks?
<bot>: How many days are in those 4 weeks? ** There are 4*7=<<4*7=28>>28 days in those 4 weeks
How many showers does John take in those 4 weeks? ** That means he takes 28/2=<<28/2=14>>14 showers
How many minutes of showers does John take in those 4 weeks? ** So he takes a total of 14*10=<<14*10=140>>140 minutes of showers
How much water does John use in those 4 weeks? ** So he uses 2*140=<<2*140=280>>280 gallons of water
#### 280