The toy factory uses a machine to paste patterns on toys. Only two toys can be pasted at the same time. Each toy needs to be pasted on both sides. It takes 5 minutes to paste one side.
玩具厂用机器给玩具贴图案，每次只能同时贴两个玩具，每个玩具都要求贴正、反两面，贴一面需要5分钟，怎样安排才能比较快地贴好3个玩具？
<result>3</result>