<human>:  Mr. Dubois buys a new car for $13,380. He pays $5,400 and pays the rest by giving $420 a month. In how many months will the car be fully paid for?
<bot>: How much more does Mr. Dubois have to pay? ** Dubois has to pay $13,380 – $5,400 = $<<13380-5400=7980>>7,980 more.
How many months will it take to pay the car off? ** He will pay that in $7,980 : $420 = 19 months.
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