With less than a month until Christmas Eve, Santa thinks that his reindeer team is running a little slowly. He wants to adjust the line-up to see if he can make his deliveries and return to the North Pole, Mrs. Claus, and a warm fire a little more quickly this year.
Santa needs eight reindeer to pull his sleigh full of toys. There is only one way that the harnesses can be connected to the sleigh: the reindeer must be arranged in four rows, with two reindeer in each row. How many different ways can the reindeer be arranged to pull the sleigh?