<human>:  Every tree that Bart cuts down gives him 75 pieces of firewood. If he burns 5 logs a day from November 1 through February 28, how many trees will he need to cut down?
<bot>: How many days are in the winter? ** November has 30 days, December has 31 days, January has 31 days and February has 28 days for a total of 30+31+31+28 = <<30+31+31+28=120>>120 days
How many pieces of wood does Bart burn in the winter? ** He burns 5 pieces of wood every day so 120*5 = <<120*5=600>>600 pieces of wood
How many trees will he need to cut down? ** Every tree he cuts down supplies 75 pieces of firewood and he will burn 600 pieces so he needs 600/75 = <<600/75=8>>8 trees
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