The engineering team will lay a 78-meter-long underground drainage pipe, and there are two kinds of pipes in the warehouse, 3 meters and 5 meters long. How many different ways can there be.
工程队要铺设78米长的地下排水管道，仓库中有3米和5米长的两种管子．可以有多少种不同的取法．
<result>6</result>