Master Wang used the same machine tool to produce a batch of parts, and 1,400 parts were produced in the first 4 days. According to this calculation, the remaining tasks will be produced in two days. How many parts are in this batch? (Solve using ratio method)
王师傅用同一台机床生产一批零件，前4天生产完1400个零件，照这样计算，剩下的任务两天生产完，这批零件共多少个？(用比例方法解答)
<result>2_100</result>