Hayes does 3 loads of laundry a week using a detergent pod for each load.  His detergent pods come 39 to a pack.  How many packs of detergent pods will he need to do a full year of laundry?
He uses 3 detergent pods a week and there are 52 weeks in a year, so he uses 3*52 = <<3*52=156>>156
His detergent has 39 pods per pack and he needs 156 pods, so he will need 156/39 = <<156/39=4>>4 packs of detergent pods
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