John's car gets 30 mpg.  He drives 20 miles to work each way 5 days a week.  He also drives another 40 miles a week for leisure travel. How many gallons of gas does he use a week?
He drives 20*2=<<20*2=40>>40 miles per day for work
So he drives 40*5=<<40*5=200>>200 miles for work
So he drives a total of 200+40=<<200+40=240>>240 miles per week
That means he uses 240/30=<<240/30=8>>8 gallons of gas a week
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