Master Gao processed a batch of parts within 3 weeks, 480 pieces were processed in the first week, accounting for 40% of the total number of parts in this batch, the ratio of the number of parts processed in the second week to the third week was 3:5, and the number of parts processed in the second week was 3:5. How many parts?
高师傅3周内加工完一批零件，第一周加工480个，占这批零件总数的40%，第二周与第三周加工的零件个数比是3：5，第二周加工了多少个零件？
<result>720</result>