arthematic operations are not working on extracted data

[Pavankt]

my json file contains total 2 stages as below.

per_stage_info_vendor_data: [ [-]
     { [-]
       Stage: stage1
       WallClockTime: 0h:30m:23s
     }
     { [-]
       Stage: stage2
        WallClockTime: 0h:52m:36s
     }
      ]

with following regular expression we are able to get the hours mins and seconds.

rex field=per_stage_info_vendor_data{}.WallClockTime max_match=0 "((?<hours>\d+)h:(?<minutes>\d+)m:(?<seconds>\d+)s)"

But when i tried |eval  stagetime=hours*3600+minutes*60+seconds  it's not working, when i checked further any of the arithmetic  operation on these three fields(hours,minutes and seconds).

do i need to convert these fields to any other format.

[ITWhisperer]

Looking at your data, it appears that the rex would give you multi-valued fields, which you can't then do arithmetic on. Please explain what it is you are trying to actually do.