The school organizes students to participate in tree planting activities. Congcong and Mingming are in pairs, and each of them has to complete the task of planting two trees. If it takes 25 minutes for each person to dig a tree pit, 20 minutes to transport saplings (up to 4 trees can be transported), 10 minutes to carry a bucket of water (4 trees can be watered), and 10 minutes to plant a tree. Minutes, so how to arrange to make the time to complete the tree planting task the shortest?
学校组织同学们参加植树活动，聪聪和明明两人一组，每人要完成栽两棵树的任务．如果每人挖一棵树坑要25分钟，运树苗一趟(最多可以运4棵树)要20分钟，提一桶水(可以浇4棵树)要10分钟，栽好一棵树要10分钟，那么怎样安排才能使完成植树任务的时间最短？
<gadget id="calculator">25 * 3</gadget>
<output>75</output>

<gadget id="calculator">75 + 10</gadget>
<output>85</output>

<result>85</result>