Below is an instruction that describes a task. Write a response that appropriately completes the request in French. Please answer in French.

### Instruction:
 Alex has not washed his clothes for a month; 18 shirts, 12 pants, 17 sweaters, and 13 jeans are waiting to be washed. Alex's washing machine can wash a maximum of 15 items per cycle. Each cycle takes 45 minutes. How many hours will it take the washing machine to wash all the clothes?


### Response:
 Alex va laver 18 + 12 + 17 + 13 = <<18+12+17+13=60>>60 articles.
60 articles / 15 articles/cycle = <<60/15=4>>4 cycles.
4 cycles x 45 minutes/cycle = <<4*45=180>>180 minutes.
180 minutes / 60 minutes/heure = <<180/60=3>>3 heures.