extract string from _raw data

[owie6466]

Hello need help to extract the number from this result:

Total number of files under /wmq/logs/AMXDEVRC120/active is: 184

i'm trying to get the total number of files from this directory and compare if over 500. 

thank you, 

[owie6466]

thanks for the help

[richgalloway]

Use rex.

... | rex "is: (?<numFiles>\d+)"
| stats sum(numFiles) as TotalFiles
| where TotalFiles > 500