Possible this helpful for you -
SELECT TOP(5) 'INSERT INTO dbo.jobs(minexperience,maxexperience) VALUES(' +
CAST(SUBSTRING(
CAST(r.Experience AS VARCHAR(50))
, 0
, r.ToExperience) * 31536000
AS VARCHAR(50))
+ ',' +
CAST(SUBSTRING(
CAST(r.Experience AS VARCHAR(50))
, r.ToExperience + 2
, patindex('%Years%', r.Experience) - r.ToExperience - 2) * 31536000
AS VARCHAR(50))
+')'
FROM (
SELECT
r.Experience
, ToExperience = PATINDEX('%to%', r.Experience)
FROM dbo.requirementsdetailsfororganization r
) r