A stick is 10 m long. A rope is 2 times as long as the stick.

If the rope is divided into 5 pieces, how many meters long is each piece of rope?

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The length of the rope is 10 x 2 = <<10*2=20>>20 meters.

Therefore, each piece of the rope is 20/5 = <<20/5=4>>4 meters long. Answer: \boxed{4}.