There are a total of 720 books on planting and breeding in Xingfu Village Farm Bookstore. The number of planting books is 4 times that of breeding books. How many farming books are there?
幸福村农家书屋里有种植类图书和养殖类图书共720本．种植类图书的本数是养殖类图书的4倍．养殖类图书共有多少本？
<result>164</result>