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The number of chickens on the farm is four times that of ducks, and there are 60 more chickens than ducks. How many chickens and ducks are there?
According to "chickens are four times as many as ducks", the number of ducks is 1 times, and the number of chickens is four times as many as ducks, so the number of chickens is three times as many as ducks, and because there are 60 more chickens than ducks, a comprehensive analysis of these two conditions shows that the extra 60 ducks are exactly three times as many as ducks, and the formula for calculating the number of ducks is 60 ÷ (4

There are 80 chickens and 20 ducks.